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: Wrong Answer)

#include <stdio.h>
 
int main(void)
{
  /* 変数の定義 */
  char dayotWeek[8];
  int day_count_util_sudday;
 
  /* 文字列の入力 */
  scanf("%s", dayotWeek);
  if("SUN" == dayotWeek){
    day_count_util_sudday = 0;
  }else if("MON" == dayotWeek){
    day_count_util_sudday = 6;
  }else if("TUE" == dayotWeek){
    day_count_util_sudday = 5;
  }else if("WED" == dayotWeek){
    day_count_util_sudday = 4;
  }else if("THU" == dayotWeek){
    day_count_util_sudday = 3;
  }else if("FRI" == dayotWeek){
    day_count_util_sudday = 2;
  }else if("SAT" == dayotWeek){
    day_count_util_sudday = 1;
  }else{
    printf("入力された文字は無効です");
    return 0;
  }
  /* 文字列の出力 */
  printf("%d\n", day_count_util_sudday);
  return 0;
}