PROGRAMMING:String encryption

Find the length of a string, and encrypt and transform the string as follows:
　　　　A->Z 　a->z
　　　　B->Y 　b->y
　　　　C->X 　c->x
　　　　…… 　……
　　　　Z->A 　z->a
That is, the letter a becomes Z, the letter B becomes y,..., and the non alphabetic characters remain unchanged.
###Input format:
Read in a line of characters from the keyboard (Convention: number of characters ≤ 127 bytes)
###Output format:
The length of this line of characters is displayed on the screen first, and then the generated ciphertext is displayed.
###Input example:
```in
AB 12@#ax
```
###Output example:
The corresponding output is given here. For example:
```out
nine
ZY 12@#zc
```







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