C1111233131211111211113313331333133313232321333133313211232313122131   >>    C111123313121111121111331333133313331323232133313331321123231312213   <<    C1111233131211111211113313331333133313232321333133313211232313122133   >>      C1111233131211111211113313331333133313232321333133313211232313122132   >>