Problem:
Score : 100 points

Problem Statement

Given is a string S representing the day of the week today.

S is SUN, MON, TUE, WED, THU, FRI, or SAT, for Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, and Saturday, respectively.

After how many days is the next Sunday (tomorrow or later)?

Constraints

S is SUN, MON, TUE, WED, THU, FRI, or SAT.

Input

Input is given from Standard Input in the following format:

S

Output

Print the number of days before the next Sunday.

Sample Input 1

SAT

Sample Output 1

1

It is Saturday today, and tomorrow will be Sunday.

Sample Input 2

SUN

Sample Output 2

7

It is Sunday today, and seven days later, it will be Sunday again.

Solution in PHP7 (7.0.15) (judge verdict: Runtime Error)

<?php
$youbi = fgets(STDIN);
echo $youbi;
switch($youbi){
    case 'SUN':
        echo 7.PHP_EOL;
        break;
    case 'MON':
        echo 6.PHP_EOL;
        break;
    case 'TUE':
        echo 5.PHP_EOL;
        break;
    case 'WED':
        echo 4.PHP_EOL;
        break;
    case 'THU':
        echo 3.PHP_EOL;
        break;
    case 'FRI':
        echo 2.PHP_EOL;
        break;
    case 'SAT':
        echo 1.PHP_EOL;
        break;
}