C11111333133313232233133313331333131123313221211113313133313232221   >>    C1111133313331323223313331333133313112331322121111331313331323222   <<    C11111333133313232233133313331333131123313221211113313133313232223   >>      C11111333133313232233133313331333131123313221211113313133313232222   >>