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>
main()
{
	int x=0,p=0,len,i,y=0,z=0;
	char s[10000];
	scanf("%s",s);
	len=strlen(s);

    if(s[0]=='A')//(
    {
	x=1;}
	
	for(i=3;i<len;i++)
		{
				if(s[i]>='a' && s[i] <='z' && i==len-1)
					{
						y=1;
					}
						else if(s[i]<='a' || s[i]>='z')
						{

							break;
						}
			
		}
	if((s[1]=='C' && (s[2]>='a' && s[2]<='z'))||((s[1]>='a' && s[1]<='z') && s[2]=='C'))
	{
		z=1;
	}
	if(x==1 && y==1 && z==1)
	{
		printf("AC\n");
	}
	else
	{
		printf("WA\n");
	}
}