PROGRAMMING:Each digit of reverse order output number

Input a positive integer from the keyboard and output the digits in reverse order.
For example: input 123, output 321.
###Input format:
Enter a positive integer directly without any additional characters.
###Output format:
Output a result directly without any additional characters.
###Input example:
```in
one hundred and twenty-three
```
###Output example:
```out
three hundred and twenty-one
```






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