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: Runtime Error)

function Main(input) {
  const week = ['SUN', 'MON', 'TUE', 'WED', 'THU', 'FRI', 'SAT'];
  const days = [7, 6, 5, 4, 3, 2, 1];
  let today = input.split("\n")[0];
  // console.log(input);

  let num = week.indexOf(today);
  console.log(days[num]);
}

Main(require("fs").readFileSync("/dev/stdin", "utf8"));