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 5.4.1) (judge verdict: Accepted)

#include<stdio.h>
#include<string.h>
int main()
{
    char s[4];
    char s1[]="SAT";
    char s2[]="SUN";
    char s3[]="MON";
    char s4[]="TUE";
    char s5[]="WED";
    char s6[]="THU";
    char s7[]="FRI";
    int a,b,c,d,e,f,g;
    gets(s);
    a=strcmp(s,s1);
    if(a==0){
        printf("1\n");
    }
    b=strcmp(s,s2);
    if(b==0){
        printf("7\n");
    }
    c=strcmp(s,s3);
    if(c==0){
        printf("6\n");
    }
    d=strcmp(s,s4);
    if(d==0){
        printf("5\n");
    }
    e=strcmp(s,s5);
    if(e==0){
        printf("4\n");
    }
    f=strcmp(s,s6);
    if(f==0){
        printf("3\n");
    }
    g=strcmp(s,s7);
    if(g==0){
        printf("2\n");
    }
    return 0;
}