Loop of length 10 starting with a string of length 5
found after enumerating 873 derivations:

.bc.caa
	rule bc -> cbba at position 0
.cbba.caa
	rule a ->  at position 3
.cbb.caa
	rule bc -> cbba at position 2
.cbcbba.aa
	rule aaa -> c at position 5
.cbcbbc.
	rule bc -> cbba at position 4
.cbcbcbba.
	rule bc -> cbba at position 3
.cbccbbabba.
	rule b ->  at position 4
.cbccbabba.
	rule b ->  at position 4
.cbccabba.
	rule b ->  at position 5
.cbccaba.
	rule b ->  at position 5
.cbccaa.