PROGRAMMING:Case conversion of string letters

This problem requires the preparation of procedures, for a string ending with "#", all the lowercase letters will be converted into uppercase letters, all the uppercase letters will be converted into lowercase letters, other characters will not be output.
###Input format:
Input as a string ending with "#" (no more than 30 characters).
###Output format:
Output the result string of case conversion in one line.
###Input example:
```in
Hello World! 123#
```
###Output example:
```out
hELLO wORLD! one hundred and twenty-three
```






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