Loop of length 10 starting with a string of length 8
found after enumerating 6337 derivations:

.acb.cbbcb
	rule acb -> bcaba at position 0
.bcaba.cbbcb
	rule b ->  at position 3
.bcaa.cbbcb
	rule acb -> bcaba at position 3
.bcabcaba.bcb
	rule b ->  at position 3
.bcacaba.bcb
	rule b ->  at position 5
.bcacaa.bcb
	rule a -> c at position 5
.bcacac.bcb
	rule acb -> bcaba at position 4
.bcacbcaba.cb
	rule a ->  at position 6
.bcacbcba.cb
	rule acb -> bcaba at position 7
.bcacbcbbcaba.
	rule a ->  at position 9
.bcacbcbbcba.