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 C (GCC 9.2.1) (judge verdict: Accepted)

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <math.h>
#include <limits.h>
#include <time.h>
int main(){
    char s[5];
    scanf("%s",s);
    if(s[0]=='S'){
        if(s[1]=='U'){
            printf("7");
            return 0;
        }
        printf("1");
        return 0;
    }
    if(s[0]=='M'){
        printf("6");
        return 0;
    }
    if(s[0]=='T'){
        if(s[1]=='U'){
            printf("5");
            return 0;
        }
        printf("3");
        return 0;
    }
    if(s[0]=='W'){
        printf("4");
        return 0;
    }
    printf("2");
    return 0;
}