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 Ruby (2.3.3) (judge verdict: Wrong Answer)

input = gets

key = ["SUN","MON","TUE","WED","THU","FRI","SAT"]

if input == key[0] then
    print 7
elsif input == key[1] then
    print 6
elsif input == key[2] then
    print 5
elsif input == key[3] then
    print 4
elsif input == key[4] then
    print 3
elsif input == key[5] then
    print 2
elsif input == key[6] then
    print 1
end