C1111233131211111211113313331333131133132321233133313113313222333131   >>    C111123313121111121111331333133313113313232123313331311331322233313   <<    C1111233131211111211113313331333131133132321233133313113313222333133   >>      C1111233131211111211113313331333131133132321233133313113313222333132   >>