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 C++14 (GCC 5.4.1) (judge verdict: Wrong Answer)

#include <iostream>
#include <stdio.h>
using namespace std;
#include <string.h>
int main()
{
    int i,flag,flag1;
    char s[10000];
    while(~scanf("%s",s))
    {
        flag=0;flag1=0;
        if(s[0]=='A'&&s[2]=='C')
            flag=1;
        if(flag==1)
        {
            if('a'<=s[1]<='z')
            {
                for(i=3; i<strlen(s); i++)
                    if(s[i]<'a')
                        flag1=1;
                if(flag1==1)
                    printf("WA\n");
                else
                    printf("AC\n");
            }
            else
                printf("WA\n");

        }
        else
            printf("WA\n");

    }
    return 0;
}