Loop of length 16 starting with a string of length 5
found after enumerating 29285 derivations:

.c.aaaa
	rule c -> ab at position 0
.ab.aaaa
	rule baa -> ccc at position 1
.accc.aa
	rule c -> ab at position 2
.acabc.aa
	rule c -> ab at position 4
.acabab.aa
	rule baa -> ccc at position 5
.acabaccc.
	rule c -> ab at position 5
.acabaabcc.
	rule baa -> ccc at position 3
.acacccbcc.
	rule c -> ab at position 3
.acaabccbcc.
	rule c -> ab at position 5
.acaababcbcc.
	rule bc ->  at position 6
.acaababcc.
	rule bc ->  at position 6
.acaabac.
	rule c -> ab at position 6
.acaabaab.
	rule baa -> ccc at position 4
.acaacccb.
	rule c -> ab at position 4
.acaaabccb.
	rule bc ->  at position 5
.acaaacb.
	rule c -> ab at position 5
.acaaaabb.