Loop of length 16 starting with a string of length 5
found after enumerating 3522 derivations:

.cb.bbb
	rule cb -> aaacc at position 0
.aaacc.bbb
	rule cb -> aaacc at position 4
.aaacaaacc.bb
	rule aaa -> ba at position 4
.aaacbacc.bb
	rule cb -> aaacc at position 7
.aaacbacaaacc.b
	rule aaa -> ba at position 7
.aaacbacbacc.b
	rule cb -> aaacc at position 6
.aaacbaaaaccacc.b
	rule aaa -> ba at position 5
.aaacbbaaccacc.b
	rule cb -> aaacc at position 12
.aaacbbaaccacaaacc.
	rule aaa -> ba at position 12
.aaacbbaaccacbacc.
	rule cb -> aaacc at position 11
.aaacbbaaccaaaaccacc.
	rule aaa -> ba at position 10
.aaacbbaaccbaaccacc.
	rule cb -> aaacc at position 9
.aaacbbaacaaaccaaccacc.
	rule aaa -> ba at position 9
.aaacbbaacbaccaaccacc.
	rule cb -> aaacc at position 8
.aaacbbaaaaaccaccaaccacc.
	rule aaa -> ba at position 6
.aaacbbbaaaccaccaaccacc.
	rule aaa -> ba at position 7
.aaacbbbbaccaccaaccacc.