Loop of length 15 starting with a string of length 10
found after enumerating 3258 derivations:

.a.bbbbbbbbb
	rule a -> bc at position 0
.bc.bbbbbbbbb
	rule cbbb -> baba at position 1
.bbaba.bbbbbb
	rule a -> bc at position 4
.bbabbc.bbbbbb
	rule cbbb -> baba at position 5
.bbabbbaba.bbb
	rule a -> bc at position 6
.bbabbbbcba.bbb
	rule a -> bc at position 9
.bbabbbbcbbc.bbb
	rule cbbb -> baba at position 10
.bbabbbbcbbbaba.
	rule cbbb -> baba at position 7
.bbabbbbbabaaba.
	rule a -> bc at position 8
.bbabbbbbbcbaaba.
	rule a ->  at position 11
.bbabbbbbbcbaba.
	rule a ->  at position 11
.bbabbbbbbcbba.
	rule a -> bc at position 12
.bbabbbbbbcbbbc.
	rule cbbb -> baba at position 9
.bbabbbbbbbabac.
	rule a ->  at position 10
.bbabbbbbbbbac.
	rule a -> bc at position 11
.bbabbbbbbbbbcc.