PROGRAMMING:scissors

Today, Xiao Hong and Xiao Ming are playing with scissors, stone and cloth
But Xiaoming likes Xiaohong, and the highest level he likes is licking. So he puts forward the method of closing his eyes and playing. As long as it's not a draw, Xiaohong will win
So Xiao Ming just needs to know if they are tied
###Input format:
The title input contains two strings representing what Xiao Hong and Xiao Ming came up with, namely "stone", "scissors" and "cloth"
###Output format:
If it's a draw, put out "no!" Little red wins and outputs "yes!"
###Input example:
Here is a set of inputs. For example:
```in
stone stone
```
###Output example:
The corresponding output is given here. For example:
```out
NO!
```







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