Loop of length 28 starting with a string of length 13
found after enumerating 2152911 derivations:

.b.caccaccaccac
	rule b -> ca at position 0
.ca.caccaccaccac
	rule acac -> bcba at position 1
.cbcba.caccaccac
	rule b -> ca at position 3
.cbccaa.caccaccac
	rule acac -> bcba at position 5
.cbccabcba.caccac
	rule b -> ca at position 5
.cbccacacba.caccac
	rule acac -> bcba at position 4
.cbccbcbaba.caccac
	rule b -> ca at position 6
.cbccbccaaba.caccac
	rule b -> ca at position 9
.cbccbccaacaa.caccac
	rule acac -> bcba at position 11
.cbccbccaacabcba.cac
	rule b -> ca at position 11
.cbccbccaacacacba.cac
	rule acac -> bcba at position 8
.cbccbccabcbaacba.cac
	rule b -> ca at position 8
.cbccbccacacbaacba.cac
	rule acac -> bcba at position 7
.cbccbccbcbabaacba.cac
	rule b -> ca at position 11
.cbccbccbcbacaaacba.cac
	rule a ->  at position 12
.cbccbccbcbacaacba.cac
	rule a ->  at position 12
.cbccbccbcbacacba.cac
	rule acac -> bcba at position 10
.cbccbccbcbbcbaba.cac
	rule b -> ca at position 10
.cbccbccbcbcacbaba.cac
	rule b -> ca at position 13
.cbccbccbcbcaccaaba.cac
	rule a ->  at position 14
.cbccbccbcbcaccaba.cac
	rule b -> ca at position 15
.cbccbccbcbcaccacaa.cac
	rule acac -> bcba at position 17
.cbccbccbcbcaccacabcba.
	rule b -> ca at position 17
.cbccbccbcbcaccacacacba.
	rule acac -> bcba at position 16
.cbccbccbcbcaccacbcbaba.
	rule b -> ca at position 16
.cbccbccbcbcaccaccacbaba.
	rule b -> ca at position 19
.cbccbccbcbcaccaccaccaaba.
	rule a ->  at position 20
.cbccbccbcbcaccaccaccaba.
	rule b -> ca at position 21
.cbccbccbcbcaccaccaccacaa.