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: Wrong Answer)

#include<stdio.h>
#include<string.h>
int main()
{
    int l,a,b,c,sum=0,temp=0,p=0,er=0,o=0;
    char ch[100000];
    gets(ch);
    l=strlen(ch);
    int i;
    if(ch[0]>='A'&&ch[0]<='Z')
    {
        sum=1;
    }
    if(ch[2]=='C')
    {
        p=1;
    }
    for(i=0;i<l;i++)
    {
       if(i==0||i==2)
        {
            continue;
        }
        temp++;
    }
    if(temp==l-2)
    {
        er=1;
    }
    o=sum+p+er;
    if(o==3)
    {
        printf("AC\n");
    }
    else
    {
        printf("WA\n");
    }
}