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: Runtime Error)

n = gets.chomp.to_i
keyword = gets.chomp
keyword= keyword.split(//)
 
# 暗号化した文字列を格納するための配列を定義
code = []
 
# keyword.charsで入力された文字列を１文字ずつ分解して配列へ
keyword.each do |char|
  num = (char.ord + n) # .ord で文字コードへ変換（数値化）しnつ分、シフトする
  code << num.chr # 文字コードを文字列へ戻し、配列codeに入れていく
end
 
# 配列codeに入った文字列を全て連結させて出力
puts code.join