PROGRAMMING:Character encryption 1

Character complementary encryption, case letter encryption rules are as follows, other characters before and after encryption unchanged.
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###Input format:
Enter a line of string you want to encrypt
###Output format:
Output encrypted string
###Input example:
Here is a set of inputs. For example:
```in
Hello World!
```
###Output example:
The corresponding output is given here. For example:
```out
Svool Dliow!
```






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