diff --git a/explore_120cell.js b/explore_120cell.js
index 134652c..6ea33b7 100644
--- a/explore_120cell.js
+++ b/explore_120cell.js
@@ -419,6 +419,38 @@ function cell5_tetras(cell120, all5, c5) {
 }
 
 
+function coherent_5cells_r(cell120, all5, c5s, c50) {
+    // Find next set of c5s, see if there are any we haven't seen, 
+    // recurse into those ones
+    const c5ns = cell5_tetras(cell120, all5, c50);
+    const c5unseen = c5ns.filter((c5) => {
+        const matched = c5s.filter((c5b) => c5match(c5b, c5));
+        return matched.length === 0;
+    });
+    for( const c5u of c5unseen ) {
+        c5s.push(c5u);
+    }
+    for( const c5u of c5unseen ) {
+        coherent_5cells_r(cell120, all5, c5s, c5u);
+    }
+}
+
+
+
+function coherent_5cells(cell120, all5) {
+    // pick a starting point, collect coherent 5_cells, continue till
+    // there aren't any new ones
+
+    const c5set = [];
+    let c5 = all5[0];
+
+    const c5s = [];
+    coherent_5cells_r(cell120, all5, c5s, c5);
+    return c5s;
+}
+
+
+
 
 
 
@@ -426,10 +458,9 @@ function cell5_tetras(cell120, all5, c5) {
 const cell120 = POLYTOPES.cell120_inscribed();
 const all5 = gather_5cells(cell120);
 
-const c5 = all5[0]
-
-const c5s = cell5_tetras(cell120, all5, c5);
+const c5s = coherent_5cells(cell120, all5);
 
 const celli = c5s.map((c5) => [ "1", "2", "3", "4", "5" ].map((l) => c5[l]));
 
 console.log(celli);
+console.log(celli.length);