Loop of length 25 starting with a string of length 8
found after enumerating 10427 derivations:

.cc.bcbcbc
	rule cc -> bcbaa at position 0
.bcbaa.bcbcbc
	rule ab -> c at position 4
.bcbac.cbcbc
	rule cc -> bcbaa at position 4
.bcbabcbaa.bcbc
	rule ab -> c at position 3
.bcbccbaa.bcbc
	rule cc -> bcbaa at position 3
.bcbbcbaabaa.bcbc
	rule ab -> c at position 7
.bcbbcbacaa.bcbc
	rule ab -> c at position 9
.bcbbcbacac.cbc
	rule cc -> bcbaa at position 9
.bcbbcbacabcbaa.bc
	rule ab -> c at position 8
.bcbbcbacccbaa.bc
	rule cc -> bcbaa at position 7
.bcbbcbabcbaacbaa.bc
	rule ab -> c at position 6
.bcbbcbccbaacbaa.bc
	rule cc -> bcbaa at position 6
.bcbbcbbcbaabaacbaa.bc
	rule ab -> c at position 10
.bcbbcbbcbacaacbaa.bc
	rule a ->  at position 11
.bcbbcbbcbacacbaa.bc
	rule a ->  at position 11
.bcbbcbbcbaccbaa.bc
	rule cc -> bcbaa at position 10
.bcbbcbbcbabcbaabaa.bc
	rule ab -> c at position 9
.bcbbcbbcbccbaabaa.bc
	rule a ->  at position 12
.bcbbcbbcbccbabaa.bc
	rule ab -> c at position 12
.bcbbcbbcbccbcaa.bc
	rule ab -> c at position 14
.bcbbcbbcbccbcac.c
	rule cc -> bcbaa at position 14
.bcbbcbbcbccbcabcbaa.
	rule ab -> c at position 13
.bcbbcbbcbccbcccbaa.
	rule cc -> bcbaa at position 13
.bcbbcbbcbccbcbcbaabaa.
	rule a ->  at position 16
.bcbbcbbcbccbcbcbabaa.
	rule ab -> c at position 16
.bcbbcbbcbccbcbcbcaa.