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++14 (GCC 5.4.1) (judge verdict: Accepted)

#include <bits/stdc++.h>
using namespace std;
#define int long long
#define rep(i,n) for(int i=0;i<n;i++)
#define krep(i,k,n,m) for(int i=k;i<n;i+=m)
#define erep(i,k,n) for(int i=k;i<n;i++)
#define mod 1000000007;
//最大公約数
int gcd(int s,int b){
    if(b==0)return s;
    return gcd(b,s%b);
}
signed main(){
    string s;
    cin>>s;
    if(s=="SUN"){
        cout<<7<<endl;
    }
    if(s=="MON"){
        cout<<6<<endl;
    }
    if(s=="TUE"){
        cout<<5<<endl;
    }
    if(s=="WED"){
        cout<<4<<endl;
    }
    if(s=="THU"){
        cout<<3<<endl;
    }
    if(s=="FRI"){
        cout<<2<<endl;
    }
    if(s=="SAT"){
        cout<<1<<endl;
    }
}