PROGRAMMING:What was the day before yesterday
Given a day between 1000 and 3000, please give the day before that day.
###Input format:
Input in a date format, such as "yyyy MM DD". The title ensures that all input dates are legal dates.
###Output format:
For each group of input, output the date in a row, such as "yyyy MM DD".
###Input example:
Here is a set of inputs. For example:
```in
2020-3-15
```
###Output example:
The corresponding output is given here. For example:
```out
2020-3-13
```
answer：If there is no answer, please comment
###Input format:
Input in a date format, such as "yyyy MM DD". The title ensures that all input dates are legal dates.
###Output format:
For each group of input, output the date in a row, such as "yyyy MM DD".
###Input example:
Here is a set of inputs. For example:
```in
2020-3-15
```
###Output example:
The corresponding output is given here. For example:
```out
2020-3-13
```
answer：If there is no answer, please comment