C1111233131211111211113313331333133313232313331333133322133313221211   >>    C111123313121111121111331333133313331323231333133313332213331322121   <<    C1111233131211111211113313331333133313232313331333133322133313221213   >>      C1111233131211111211113313331333133313232313331333133322133313221212   >>