C1111233131211111211113313331333131133132321233133313331123232311   >>    C111123313121111121111331333133313113313232123313331333112323231   <<    C1111233131211111211113313331333131133132321233133313331123232313   >>      C1111233131211111211113313331333131133132321233133313331123232312   >>