PROGRAMMING:I don't know

Once the capital key of little Y's keyboard broke down (typing letters in random case), but now he needs to type a few strings (only English letters), but sometimes he is a little careless and will type the wrong letters. Then now I need sharp eyed you to help me find out if he is careless (only different case is not careless). If not, please tell me how many times the keyboard is broken.
###Input format:
Enter the first line to give a positive integer n, representing the number of strings he will type next.
Then, 2n lines of string are given, corresponding to each other.
The length of each string is less than 100. There are many groups of data.
###Output format:
Output format:
Every two strings output a line, if he carelessly output "no!", No careless output of "yes!" And in the back of a blank output keyboard bad times
###Input example:
Here is a set of inputs. For example:
```in
two
abcdfef
aBCdfef
c
c
one
qwer
QEWr
```
###Output example:
The corresponding output is given here. For example:
```out
YES! two
YES! 0
NO!
```







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