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)

# N = gets.chomp.to_i
# A, B, C = gets.chomp.split.map(&:to_i)
S = gets.chomp

case S
when 'SUN'
  p 7
when 'MON'
  p 6
when 'TUE' 
  p 5
when 'WED'
  p 4
when 'THU'
  p 3
when 'FRI'
  p 2
when 'SAT'
  p 1
end