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 (GCC 5.4.1) (judge verdict: Accepted)

#include <stdio.h>

int main(void)
{
    char s[10];
    int point = 0, mojisu, i, count = 0;
    scanf("%s", s);

    for (i = 0; s[i] != '\0'; i++)
    {}

    mojisu = i;

    if (s[0] == 'A' )
    {
        point += 1;
        for (i = 2; i < (mojisu - 1); i++)
        {
            if (s[i] == 'C')
            {
                count++;
            }
        }
        if (count == 1)
        {
            point += 1;
            count = 0;
            for (i = 0; i < 10; i++)
            {
                if(s[i] >= 'a' && s[i] <= 'z')
                {
                    count++;
                }
            }
            if (count == mojisu - 2)
            {
                point += 1;
            }
        }
    }
    if (point == 3)
    {
        printf("AC\n");
    }
    else if(point != 3)
    {
        printf("WA\n");
    }
    return (0);
}