PROGRAMMING:String test 03

Input a string less than 20 in length, cut it into two substrings from the middle, compare the size, and output a larger string.
If "123456789", output 56789
If "efghabcd", output efgh
###Input format:
Enter a string less than 20 in length
###Output format:
Output larger substring
###Input example:
```in
one hundred and twenty-three million four hundred and fifty-six thousand seven hundred and eighty-nine
```
###Output example:
```out
fifty-six thousand seven hundred and eighty-nine
```







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