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)

int main(void){
  char a[3],d[7][3] = {"SUN","MON","TUE","WED","THU","FRI","SAT"};
  
  scanf("%s",a);
  
  int i=6;
  
  while(1){
    if(a[0] == d[i][0] && a[1] == d[i][1]) {
      printf("%d",7-i);
      break;
    }
    
    i --;
  }
    
}