Loop of length 16 starting with a string of length 10
found after enumerating 62238 derivations:

.cbaa.aaaaaa
	rule cbaa -> aaacca at position 0
.aaacca.aaaaaa
	rule a -> b at position 5
.aaaccb.aaaaaa
	rule cbaa -> aaacca at position 4
.aaacaaacca.aaaa
	rule a -> b at position 4
.aaacbaacca.aaaa
	rule a -> b at position 9
.aaacbaaccb.aaaa
	rule cbaa -> aaacca at position 8
.aaacbaacaaacca.aa
	rule a -> b at position 8
.aaacbaacbaacca.aa
	rule cbaa -> aaacca at position 7
.aaacbaaaaaccacca.aa
	rule a -> b at position 12
.aaacbaaaaaccbcca.aa
	rule a -> b at position 15
.aaacbaaaaaccbccb.aa
	rule cbaa -> aaacca at position 14
.aaacbaaaaaccbcaaacca.
	rule a -> b at position 14
.aaacbaaaaaccbcbaacca.
	rule cbaa -> aaacca at position 13
.aaacbaaaaaccbaaaccacca.
	rule cbaa -> aaacca at position 11
.aaacbaaaaacaaaccaaccacca.
	rule a -> b at position 11
.aaacbaaaaacbaaccaaccacca.
	rule cbaa -> aaacca at position 10
.aaacbaaaaaaaaccaccaaccacca.