C11111333133313232233133313331333131123313221211113313223132311   >>    C1111133313331323223313331333133313112331322121111331322313231   <<    C11111333133313232233133313331333131123313221211113313223132313   >>      C11111333133313232233133313331333131123313221211113313223132312   >>