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: Wrong Answer)

<?php
  
  $a = fgets(STDIN);
	
if($a === 'SUN'){
  echo 7;
}elseif($a === 'MON'){
  echo 6;
}elseif($a === 'TUE'){
  echo 5;
}elseif($a === 'WED'){
  echo 4;
}elseif($a === 'THU'){
  echo 3;
}elseif($a === 'FRI'){
  echo 2;
}elseif($a === 'SAT'){
  echo 1;
}