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>
#include<math.h>
#define rep(i,n) for(i=0; i<n; i++)

int main(void)
{
	int i;
	char a[4];
	char b[7][4]={"SUN", "MON", "TUE", "WED", "THU", "FRI", "SAT"};
	scanf("%s", a);
	rep(i,7){
		if(strcmp(a,b[i]) == 0){
			printf("%d", 7-i);
			return 0;
		}
	}
	return 0;
}