C11111333133313232233133313331333131123313221211113313232222131   >>    C1111133313331323223313331333133313112331322121111331323222213   <<    C11111333133313232233133313331333131123313221211113313232222133   >>      C11111333133313232233133313331333131123313221211113313232222132   >>