Score : $100$ points
Given is a string $S$ representing the day of the week today.
SAT, for Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, and Saturday, respectively.
After how many days is the next Sunday (tomorrow or later)?
Input is given from Standard Input in the following format:
Print the number of days before the next Sunday.
It is Saturday today, and tomorrow will be Sunday.
It is Sunday today, and seven days later, it will be Sunday again.