Loop of length 11 starting with a string of length 8
found after enumerating 34302 derivations:

.ab.bbacbb
	rule ab -> bbaca at position 0
.bbaca.bbacbb
	rule ab -> bbaca at position 4
.bbacbbaca.bacbb
	rule b ->  at position 4
.bbacbaca.bacbb
	rule b ->  at position 4
.bbacaca.bacbb
	rule cac ->  at position 3
.bbaa.bacbb
	rule ab -> bbaca at position 3
.bbabbaca.acbb
	rule a ->  at position 7
.bbabbac.acbb
	rule cac ->  at position 6
.bbabba.bb
	rule ab -> bbaca at position 5
.bbabbbbaca.b
	rule b ->  at position 5
.bbabbbaca.b
	rule ab -> bbaca at position 8
.bbabbbacbbaca.