PROGRAMMING:Replace lowercase letters in a string

Enter a string and a single character to replace all lowercase letters in the string with the input character.
###Input format:
Enter two lines, the first line is not more than 80 long and ends with carriage return. Enter a single character on the second line
###Output format:
Output the replaced string
###Input example:
For example:
```in
Hello World!
seven
```
###Output example:
```out
H7777 W7777!
```






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