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: Accepted)

<?php
$weekdays = [
    'SUN' => 7,
    'MON' => 6,
    'TUE' => 5,
    'WED' => 4,
    'THU' => 3,
    'FRI' => 2,
    'SAT' => 1,
];

$stdin = trim(fgets(STDIN));
echo $weekdays[$stdin].PHP_EOL;