PROGRAMMING:Xiao Ming's great method of shrinking bones
The magic Xiaoming recently invented a powerful "bone shrinking method". He defined that if a character is followed by a number, it means there are several such characters. For more explanation, see the following example. Using this method, Xiaoming can write a lot less words. Now let's restore the appearance of the string before it was rewritten by Xiaoming!
###Input format:
A string of characters per line. Data processing to the end of the file
###Output format:
Output the character before rewriting, only one line for each example
###Input example:
Here is a set of inputs. For example:
```in
a2b3c
a1bcd
```
###Output example:
The corresponding output is given here. For example:
```out
aabbbc
abcd
```
###Tips:
The string length is less than 100, including only numbers and lowercase letters. Numbers only appear after letters, and numbers greater than 0 and less than 10
answer：If there is no answer, please comment
###Input format:
A string of characters per line. Data processing to the end of the file
###Output format:
Output the character before rewriting, only one line for each example
###Input example:
Here is a set of inputs. For example:
```in
a2b3c
a1bcd
```
###Output example:
The corresponding output is given here. For example:
```out
aabbbc
abcd
```
###Tips:
The string length is less than 100, including only numbers and lowercase letters. Numbers only appear after letters, and numbers greater than 0 and less than 10
answer：If there is no answer, please comment