Loop of length 11 starting with a string of length 8
found after enumerating 13909 derivations:

.bca.cacaa
	rule bca -> aacbb at position 0
.aacbb.cacaa
	rule bca -> aacbb at position 4
.aacbaacbb.caa
	rule a -> c at position 4
.aacbcacbb.caa
	rule bca -> aacbb at position 8
.aacbcacbaacbb.a
	rule a -> c at position 8
.aacbcacbcacbb.a
	rule bca -> aacbb at position 7
.aacbcacaacbbcbb.a
	rule a ->  at position 7
.aacbcacacbbcbb.a
	rule b ->  at position 9
.aacbcacacbcbb.a
	rule b ->  at position 11
.aacbcacacbcb.a
	rule b ->  at position 11
.aacbcacacbc.a
	rule bca -> aacbb at position 9
.aacbcacacaacbb.