Problem:
Score : 200 points

Problem Statement

You are given a string S. Each character of S is uppercase or lowercase English letter.
Determine if S satisfies all of the following conditions:

The initial character of S is an uppercase A.

There is exactly one occurrence of C between the third character from the beginning and the second to last character (inclusive).

All letters except the A and C mentioned above are lowercase.

Constraints

4 ≤ |S| ≤ 10 (|S| is the length of the string S.)

Each character of S is uppercase or lowercase English letter.

Input

Input is given from Standard Input in the following format:

S

Output

If S satisfies all of the conditions in the problem statement, print AC; otherwise, print WA.

Sample Input 1

AtCoder

Sample Output 1

AC

The first letter is A, the third letter is C and the remaining letters are all lowercase, so all the conditions are satisfied.

Sample Input 2

ACoder

Sample Output 2

WA

The second letter should not be C.

Sample Input 3

AcycliC

Sample Output 3

WA

The last letter should not be C, either.

Sample Input 4

AtCoCo

Sample Output 4

WA

There should not be two or more occurrences of C.

Sample Input 5

Atcoder

Sample Output 5

WA

The number of C should not be zero, either.

Solution in Fortran (gfortran v4.8.4) (judge verdict: Wrong Answer)

program main
	implicit none
	integer       :: i, counter_C = 0, counter_Big = 0
	character(10) :: S
	read(*, *) S
	if(S(1:1) /= "A") then
		write(*, *) "WA"
	else
		do i = 3, len_trim(S)-2
			if(S(i:i) == "C") then
				counter_C = counter_C + 1
			end if
		end do
		do i = 1, len_trim(S)
			if(S(i:i) >= "A" .AND. S(i:i) <= "Z") then
				counter_Big = counter_Big + 1
			end if
		end do
	end if
	if(counter_C == 1 .AND. counter_Big == 2) then
		write(*, *) "AC"
	else
		write(*, *) "WA"
	end if
end program main