PROGRAMMING:Removes all characters in a string with even subscripts

Delete all the characters with even subscript in a string and output the remaining characters into a new string.
###Input format:
Enter a string less than 20 in length on one line. Do not use line breaks, spaces, tabs in strings.
###Output format:
Output the changed string directly.
###Input example:
```in
asdfghj
```
###Output example:
```out
sfh
```






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