seed 13: 42 candidates; B accepts 4
M1: pool 729, k=36; accepts 4 (0 new)
M2: accepts 3
M3: accepts 16 (12 recovered by pruning); scenes in >1 cluster: 68
blind sheet: 21 distinct clusters, 576 lines

real	0m54.699s
user	0m39.193s
sys	0m14.866s
exit 0