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 Haskell (GHC 7.10.3) (judge verdict: Accepted)

main :: IO()
main = do
    str <- getLine
    print $ getsolve str
    
getsolve :: String -> Int
getsolve str
    | str == "SUN"			= 7
    | str == "MON"			= 6
    | str == "TUE"			= 5
    | str == "WED"			= 4
    | str == "THU"			= 3
    | str == "FRI"			= 2
    | str == "SAT"			= 1
    | otherwise				= 0