PROGRAMMING:Delete public characters
Enter two strings to remove all characters in the second string from the first string. For example, if you enter "they are students." and "aeiou," the first deleted string becomes "thy R stdnts.".
###Input format:
The input contains multiple sets of tests, and each test input contains two strings.
###Output format:
Output the deleted string.
###Input example:
```in
They are students.
aeiou
```
###Output example:
```out
Thy r stdnts.
```
###Tips:
STL container
###Source:
Algorithm design and analysis (2nd Edition) by Li Chunbao
answer：If there is no answer, please comment
###Input format:
The input contains multiple sets of tests, and each test input contains two strings.
###Output format:
Output the deleted string.
###Input example:
```in
They are students.
aeiou
```
###Output example:
```out
Thy r stdnts.
```
###Tips:
STL container
###Source:
Algorithm design and analysis (2nd Edition) by Li Chunbao
answer：If there is no answer, please comment