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: Accepted)

str = $stdin.gets.chomp

if str == "SUN"
    ans = 7
elsif str == "MON"
    ans = 6
elsif str == "TUE"
    ans = 5
elsif str == "WED"
    ans = 4
elsif str == "THU"
    ans = 3
elsif str == "FRI"
    ans = 2
elsif str == "SAT"
    ans = 1
end

puts ans