diff --git a/README.md b/README.md
index 4d16178..47a4e45 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,58 @@ Days of Christmas.
 This is the most stupidly Haskell way I could think of: it makes a product of
 all the combinations of "$NUMBER $WORD $WORD" and then filters them. Filtering
 on word length alone wasn't enough, so the signature for each gift also includes
-the offset into the following lists:
+the offset into the lists of alternatives at the end of this page.
+
+ADDENDUM: I added a flag which makes the script pick randomly from the list of
+alternatives, which gives Oulipian variants on the original which have the quality
+that the lines (and the spacing of the words) are the same length, for example:
+
+```
+On the twelfth day of Christmas my true love gave to me
+Eleven drummers drumming
+Eleven French piping
+Ten lords a-leaping
+Nine French dancing
+Seven geese a-leaping
+Eight geese a-swimming
+Ten swans a-laying
+Nine gold doves
+Four calling rings
+Eight French hens
+Six French birds
+And a partridge in a pear tree
+
+On the twelfth day of Christmas my true love gave to me
+Eleven drummers drumming
+Eleven turtle piping
+Ten geese a-milking
+Nine French dancing
+Eight maids a-leaping
+Eight swans a-swimming
+Ten lords drumming
+Five gold rings
+Nine calling rings
+Three ladies hens
+Six French doves
+And a partridge in a pear tree
+
+On the twelfth day of Christmas my true love gave to me
+Eleven drummers drumming
+Eleven turtle piping
+Six maids a-milking
+Five ladies dancing
+Three lords a-milking
+Seven maids a-swimming
+Six maids drumming
+Nine gold birds
+Four calling rings
+Seven ladies hens
+Ten French rings
+And a partridge in a pear tree
+```
+
+[Original](original.txt) | [Random 1](random1.txt) | [Random 2](random2.txt) | [Random 3](random3.txt)
+
 
 ```
 two turtle doves
diff --git a/original.txt b/original.txt
new file mode 100644
index 0000000..8592bee
--- /dev/null
+++ b/original.txt
@@ -0,0 +1,103 @@
+On the first day of Christmas my true love gave to me
+A partridge in a pear tree
+
+On the second day of Christmas my true love gave to me
+Two turtle doves
+And a partridge in a pear tree
+
+On the third day of Christmas my true love gave to me
+Three French hens
+Two turtle doves
+And a partridge in a pear tree
+
+On the fourth day of Christmas my true love gave to me
+Four calling birds
+Three French hens
+Two turtle doves
+And a partridge in a pear tree
+
+On the fifth day of Christmas my true love gave to me
+Five gold rings
+Four calling birds
+Three French hens
+Two turtle doves
+And a partridge in a pear tree
+
+On the sixth day of Christmas my true love gave to me
+Six geese a-laying
+Five gold rings
+Four calling birds
+Three French hens
+Two turtle doves
+And a partridge in a pear tree
+
+On the seventh day of Christmas my true love gave to me
+Seven swans a-swimming
+Six geese a-laying
+Five gold rings
+Four calling birds
+Three French hens
+Two turtle doves
+And a partridge in a pear tree
+
+On the eighth day of Christmas my true love gave to me
+Eight maids a-milking
+Seven swans a-swimming
+Six geese a-laying
+Five gold rings
+Four calling birds
+Three French hens
+Two turtle doves
+And a partridge in a pear tree
+
+On the ninth day of Christmas my true love gave to me
+Nine ladies dancing
+Eight maids a-milking
+Seven swans a-swimming
+Six geese a-laying
+Five gold rings
+Four calling birds
+Three French hens
+Two turtle doves
+And a partridge in a pear tree
+
+On the tenth day of Christmas my true love gave to me
+Ten lords a-leaping
+Nine ladies dancing
+Eight maids a-milking
+Seven swans a-swimming
+Six geese a-laying
+Five gold rings
+Four calling birds
+Three French hens
+Two turtle doves
+And a partridge in a pear tree
+
+On the eleventh day of Christmas my true love gave to me
+Eleven pipers piping
+Ten lords a-leaping
+Nine ladies dancing
+Eight maids a-milking
+Seven swans a-swimming
+Six geese a-laying
+Five gold rings
+Four calling birds
+Three French hens
+Two turtle doves
+And a partridge in a pear tree
+
+On the twelfth day of Christmas my true love gave to me
+Twelve drummers drumming
+Eleven pipers piping
+Ten lords a-leaping
+Nine ladies dancing
+Eight maids a-milking
+Seven swans a-swimming
+Six geese a-laying
+Five gold rings
+Four calling birds
+Three French hens
+Two turtle doves
+And a partridge in a pear tree
+
+
diff --git a/random1.txt b/random1.txt
new file mode 100644
index 0000000..7d73565
--- /dev/null
+++ b/random1.txt
@@ -0,0 +1,103 @@
+On the first day of Christmas my true love gave to me
+A partridge in a pear tree
+
+On the second day of Christmas my true love gave to me
+Six French birds
+And a partridge in a pear tree
+
+On the third day of Christmas my true love gave to me
+Eight French hens
+Six French birds
+And a partridge in a pear tree
+
+On the fourth day of Christmas my true love gave to me
+Four calling rings
+Eight French hens
+Six French birds
+And a partridge in a pear tree
+
+On the fifth day of Christmas my true love gave to me
+Nine gold doves
+Four calling rings
+Eight French hens
+Six French birds
+And a partridge in a pear tree
+
+On the sixth day of Christmas my true love gave to me
+Ten swans a-laying
+Nine gold doves
+Four calling rings
+Eight French hens
+Six French birds
+And a partridge in a pear tree
+
+On the seventh day of Christmas my true love gave to me
+Eight geese a-swimming
+Ten swans a-laying
+Nine gold doves
+Four calling rings
+Eight French hens
+Six French birds
+And a partridge in a pear tree
+
+On the eighth day of Christmas my true love gave to me
+Seven geese a-leaping
+Eight geese a-swimming
+Ten swans a-laying
+Nine gold doves
+Four calling rings
+Eight French hens
+Six French birds
+And a partridge in a pear tree
+
+On the ninth day of Christmas my true love gave to me
+Nine French dancing
+Seven geese a-leaping
+Eight geese a-swimming
+Ten swans a-laying
+Nine gold doves
+Four calling rings
+Eight French hens
+Six French birds
+And a partridge in a pear tree
+
+On the tenth day of Christmas my true love gave to me
+Ten lords a-leaping
+Nine French dancing
+Seven geese a-leaping
+Eight geese a-swimming
+Ten swans a-laying
+Nine gold doves
+Four calling rings
+Eight French hens
+Six French birds
+And a partridge in a pear tree
+
+On the eleventh day of Christmas my true love gave to me
+Eleven French piping
+Ten lords a-leaping
+Nine French dancing
+Seven geese a-leaping
+Eight geese a-swimming
+Ten swans a-laying
+Nine gold doves
+Four calling rings
+Eight French hens
+Six French birds
+And a partridge in a pear tree
+
+On the twelfth day of Christmas my true love gave to me
+Eleven drummers drumming
+Eleven French piping
+Ten lords a-leaping
+Nine French dancing
+Seven geese a-leaping
+Eight geese a-swimming
+Ten swans a-laying
+Nine gold doves
+Four calling rings
+Eight French hens
+Six French birds
+And a partridge in a pear tree
+
+
diff --git a/random2.txt b/random2.txt
new file mode 100644
index 0000000..018a2ce
--- /dev/null
+++ b/random2.txt
@@ -0,0 +1,103 @@
+On the first day of Christmas my true love gave to me
+A partridge in a pear tree
+
+On the second day of Christmas my true love gave to me
+Six French doves
+And a partridge in a pear tree
+
+On the third day of Christmas my true love gave to me
+Three ladies hens
+Six French doves
+And a partridge in a pear tree
+
+On the fourth day of Christmas my true love gave to me
+Nine calling rings
+Three ladies hens
+Six French doves
+And a partridge in a pear tree
+
+On the fifth day of Christmas my true love gave to me
+Five gold rings
+Nine calling rings
+Three ladies hens
+Six French doves
+And a partridge in a pear tree
+
+On the sixth day of Christmas my true love gave to me
+Ten lords drumming
+Five gold rings
+Nine calling rings
+Three ladies hens
+Six French doves
+And a partridge in a pear tree
+
+On the seventh day of Christmas my true love gave to me
+Eight swans a-swimming
+Ten lords drumming
+Five gold rings
+Nine calling rings
+Three ladies hens
+Six French doves
+And a partridge in a pear tree
+
+On the eighth day of Christmas my true love gave to me
+Eight maids a-leaping
+Eight swans a-swimming
+Ten lords drumming
+Five gold rings
+Nine calling rings
+Three ladies hens
+Six French doves
+And a partridge in a pear tree
+
+On the ninth day of Christmas my true love gave to me
+Nine French dancing
+Eight maids a-leaping
+Eight swans a-swimming
+Ten lords drumming
+Five gold rings
+Nine calling rings
+Three ladies hens
+Six French doves
+And a partridge in a pear tree
+
+On the tenth day of Christmas my true love gave to me
+Ten geese a-milking
+Nine French dancing
+Eight maids a-leaping
+Eight swans a-swimming
+Ten lords drumming
+Five gold rings
+Nine calling rings
+Three ladies hens
+Six French doves
+And a partridge in a pear tree
+
+On the eleventh day of Christmas my true love gave to me
+Eleven turtle piping
+Ten geese a-milking
+Nine French dancing
+Eight maids a-leaping
+Eight swans a-swimming
+Ten lords drumming
+Five gold rings
+Nine calling rings
+Three ladies hens
+Six French doves
+And a partridge in a pear tree
+
+On the twelfth day of Christmas my true love gave to me
+Eleven drummers drumming
+Eleven turtle piping
+Ten geese a-milking
+Nine French dancing
+Eight maids a-leaping
+Eight swans a-swimming
+Ten lords drumming
+Five gold rings
+Nine calling rings
+Three ladies hens
+Six French doves
+And a partridge in a pear tree
+
+
diff --git a/random3.txt b/random3.txt
new file mode 100644
index 0000000..245d37b
--- /dev/null
+++ b/random3.txt
@@ -0,0 +1,103 @@
+On the first day of Christmas my true love gave to me
+A partridge in a pear tree
+
+On the second day of Christmas my true love gave to me
+Ten French rings
+And a partridge in a pear tree
+
+On the third day of Christmas my true love gave to me
+Seven ladies hens
+Ten French rings
+And a partridge in a pear tree
+
+On the fourth day of Christmas my true love gave to me
+Four calling rings
+Seven ladies hens
+Ten French rings
+And a partridge in a pear tree
+
+On the fifth day of Christmas my true love gave to me
+Nine gold birds
+Four calling rings
+Seven ladies hens
+Ten French rings
+And a partridge in a pear tree
+
+On the sixth day of Christmas my true love gave to me
+Six maids drumming
+Nine gold birds
+Four calling rings
+Seven ladies hens
+Ten French rings
+And a partridge in a pear tree
+
+On the seventh day of Christmas my true love gave to me
+Seven maids a-swimming
+Six maids drumming
+Nine gold birds
+Four calling rings
+Seven ladies hens
+Ten French rings
+And a partridge in a pear tree
+
+On the eighth day of Christmas my true love gave to me
+Three lords a-milking
+Seven maids a-swimming
+Six maids drumming
+Nine gold birds
+Four calling rings
+Seven ladies hens
+Ten French rings
+And a partridge in a pear tree
+
+On the ninth day of Christmas my true love gave to me
+Five ladies dancing
+Three lords a-milking
+Seven maids a-swimming
+Six maids drumming
+Nine gold birds
+Four calling rings
+Seven ladies hens
+Ten French rings
+And a partridge in a pear tree
+
+On the tenth day of Christmas my true love gave to me
+Six maids a-milking
+Five ladies dancing
+Three lords a-milking
+Seven maids a-swimming
+Six maids drumming
+Nine gold birds
+Four calling rings
+Seven ladies hens
+Ten French rings
+And a partridge in a pear tree
+
+On the eleventh day of Christmas my true love gave to me
+Eleven turtle piping
+Six maids a-milking
+Five ladies dancing
+Three lords a-milking
+Seven maids a-swimming
+Six maids drumming
+Nine gold birds
+Four calling rings
+Seven ladies hens
+Ten French rings
+And a partridge in a pear tree
+
+On the twelfth day of Christmas my true love gave to me
+Eleven drummers drumming
+Eleven turtle piping
+Six maids a-milking
+Five ladies dancing
+Three lords a-milking
+Seven maids a-swimming
+Six maids drumming
+Nine gold birds
+Four calling rings
+Seven ladies hens
+Ten French rings
+And a partridge in a pear tree
+
+