PROGRAMMING:Finds the longest numeric substring in a string

Finds the longest numeric substring in a string.
###Input format:
Enter a string.
###Output format:
Output the longest digital substring; If there is no number in the string, output 'no'.
###Input example:
```in
Enter 789 the final 8764end
```
###Output example:
The corresponding output is given here. For example:
```out
eight thousand seven hundred and sixty-four
```
###Input example:
```in
Enter the final
```
###Output example:
The corresponding output is given here. For example:
```out
No
```







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