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 Rust (1.42.0) (judge verdict: Accepted)

use text_io::*;
use std::process::exit;
use im_rc::HashMap;
use std::cmp::min;

fn main(){
    let mut a:String = read!();
    if a=="SUN" {
        println!("7");
    }
    if a=="MON" {
        println!("6");
    }
    if a=="TUE" {
        println!("5");
    }
    if a=="WED" {
        println!("4");
    }
    if a=="THU" {
        println!("3");
    }
    if a=="FRI" {
        println!("2");
    }
    if a=="SAT" {
        println!("1");
    }
}