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 JavaScript (node.js v5.12) (judge verdict: Accepted)

function main(arg) {
	arg = arg.trim();
	var day = ['MON', 'TUE', 'WED', 'THU', 'FRI', 'SAT', 'SUN'];
  	var out = day.indexOf(arg);
  	switch (out) {
      case 0:
        out = 6;
        break;
      case 1:
        out = 5;
        break;
      case 2:
        out = 4;
        break;
      case 3:
        out = 3;
        break;
      case 4:
        out = 2;
        break;
      case 5:
        out = 1;
        break;
      case 6:
        out = 7;
        break;
	}
  console.log(out)
}
main(require('fs').readFileSync('/dev/stdin', 'utf8'));