Loop of length 16 starting with a string of length 10
found after enumerating 200549 derivations:

.caab.ababab
	rule caab -> aaacca at position 0
.aaacca.ababab
	rule caab -> aaacca at position 4
.aaacaaacca.abab
	rule a -> b at position 6
.aaacaabcca.abab
	rule caab -> aaacca at position 8
.aaacaabcaaacca.ab
	rule a -> b at position 10
.aaacaabcaabcca.ab
	rule caab -> aaacca at position 7
.aaacaabaaaccacca.ab
	rule a -> b at position 8
.aaacaababaccacca.ab
	rule caab -> aaacca at position 14
.aaacaababaccacaaacca.
	rule a -> b at position 16
.aaacaababaccacaabcca.
	rule caab -> aaacca at position 13
.aaacaababaccaaaaccacca.
	rule a -> b at position 14
.aaacaababaccaabaccacca.
	rule caab -> aaacca at position 11
.aaacaababacaaaccaaccacca.
	rule a -> b at position 13
.aaacaababacaabccaaccacca.
	rule caab -> aaacca at position 10
.aaacaababaaaaccaccaaccacca.
	rule a -> b at position 10
.aaacaabababaaccaccaaccacca.
	rule a -> b at position 12
.aaacaababababccaccaaccacca.