C1111233131211111211113313331333133313221211113313331333133313232233113231   >>    C111123313121111121111331333133313331322121111331333133313331323223311323   <<    C1111233131211111211113313331333133313221211113313331333133313232233113233   >>      C1111233131211111211113313331333133313221211113313331333133313232233113232   >>