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 (Clang 3.8.0) (judge verdict: Wrong Answer)

#include<stdio.h>
int main(){
  char x[5];
  int a;
  scanf("%s", x);
  if(x == "SUN"){
      a = 0;
  }
  else if(x == "MON"){
      a = 1;
  }
  else if(x == "TUE"){
      a = 2;
  }
  else if(x == "WED"){
      a = 3;
  }
  else if(x == "THU"){
      a = 4;
  }
  else if(x == "MON"){
      a = 5;
  }
  else if(x == "FRI"){
      a = 6;
  }
  else if(x == "SAT"){
      a = 7;
  }
	printf("%d",7-a);
  
 return 0;
}