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 Perl (v5.18.2) (judge verdict: Accepted)

#!/usr/bin/perl

use strict;
use warnings;

my $s = <STDIN>;
chomp $s;
my %weekday = ( SUN=>7,
                MON=>6,
                TUE=>5,
                WED=>4,
                THU=>3,
                FRI=>2,
                SAT=>1);
print $weekday{$s};