C11111211113313112113313331333133313133313232233133313231321123221211   >>    C1111121111331311211331333133313331313331323223313331323132112322121   <<    C11111211113313112113313331333133313133313232233133313231321123221213   >>      C11111211113313112113313331333133313133313232233133313231321123221212   >>