C1111233131211111211113313331333133313311211111333133313331333131133133322211   >>    C111123313121111121111331333133313331331121111133313331333133313113313332221   <<    C1111233131211111211113313331333133313311211111333133313331333131133133322213   >>      C1111233131211111211113313331333133313311211111333133313331333131133133322212   >>