C11111333133313232233133313331333133313231312111133131131231211   >>    C1111133313331323223313331333133313331323131211113313113123121   <<    C11111333133313232233133313331333133313231312111133131131231213   >>      C11111333133313232233133313331333133313231312111133131131231212   >>