C11111333133313232233133313331333133313231313131211113313223111211   >>    C1111133313331323223313331333133313331323131313121111331322311121   <<    C11111333133313232233133313331333133313231313131211113313223111213   >>      C11111333133313232233133313331333133313231313131211113313223111212   >>