PROGRAMMING:How many black fives were there that year?
If the 13th of a month happens to be a Friday, that day is called Black Friday. You are required to enter a year to calculate how many black Friday days there are in that year.
###Input format:
Enter a year
###Output format:
Output the number of times that year's black five in one line.
###Input example:
Here is a set of inputs. For example:
```in
one thousand nine hundred and ninety-eight
```
###Output example:
The corresponding output is given here. For example:
```out
three
```
answer：If there is no answer, please comment
###Input format:
Enter a year
###Output format:
Output the number of times that year's black five in one line.
###Input example:
Here is a set of inputs. For example:
```in
one thousand nine hundred and ninety-eight
```
###Output example:
The corresponding output is given here. For example:
```out
three
```
answer：If there is no answer, please comment