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 <bits/stdc++.h>
using namespace std;
int main()
{
	char c[11];
	int flag=0,flag1=0,i;
	scanf("%s",c);
	for(i=0;i<strlen(c);i++)
	{
		if(i==1&&c[i]=='C')
		{
			printf("WA");
			return 0;
		}
		if(c[i]=='C'&&flag1==1)
		{
			printf("WA");
	    	return 0;
		}
		if(i==0)
			if(c[i]!='A')
			{
				printf("WA");
				return 0;
			}
		if(c[i]=='C'&&i==strlen(c)-1)
		{
			printf("WA");
			return 0;
		}
		if(c[i]=='C')
		{
			flag1++;
		}
		if(c[i]!='C'&&(!c[i]>=97))
		{
			printf("WA");
			return 0;
		}
	}
	if(flag1==0)
		printf("WA");
	else
		printf("AC");
	return 0;
}