C1111233131211111211113313331333133313331322322331312111113311232313111   >>    C111123313121111121111331333133313331333132232233131211111331123231311   <<    C1111233131211111211113313331333133313331322322331312111113311232313113   >>      C1111233131211111211113313331333133313331322322331312111113311232313112   >>