C11111333133313232233133313331333133313231333133313332213221211   >>    C1111133313331323223313331333133313331323133313331333221322121   <<    C11111333133313232233133313331333133313231333133313332213221213   >>      C11111333133313232233133313331333133313231333133313332213221212   >>