PROGRAMMING:Find the number of days in a month

Enter the year and month to find the days of the month. The rule of leap year is that the year that can be divided by 4 but not by 100 or by 400 is leap year.
###Input format:
Enter a number of years and months,
###Output format:
Output the days of the corresponding year.
###Input example:
```in
2008 2
```
###Output example:
```out
twenty-nine
```







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