Loop of length 12 starting with a string of length 6
found after enumerating 1867 derivations:

.a.bcbcc
	rule a -> b at position 0
.b.bcbcc
	rule bbc -> ccaaa at position 0
.ccaaa.bcc
	rule a -> b at position 2
.ccbaa.bcc
	rule a -> b at position 3
.ccbba.bcc
	rule a -> b at position 4
.ccbbb.bcc
	rule bbc -> ccaaa at position 4
.ccbbccaaa.c
	rule bbc -> ccaaa at position 2
.ccccaaacaaa.c
	rule a -> b at position 6
.ccccaabcaaa.c
	rule a -> b at position 8
.ccccaabcbaa.c
	rule a -> b at position 9
.ccccaabcbba.c
	rule a -> b at position 10
.ccccaabcbbb.c
	rule bbc -> ccaaa at position 9
.ccccaabcbccaaa.