C1111233131211111211113313331333133313232313331333131133131133132331123211   >>    C111123313121111121111331333133313331323231333133313113313113313233112321   <<    C1111233131211111211113313331333133313232313331333131133131133132331123213   >>      C1111233131211111211113313331333133313232313331333131133131133132331123212   >>