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<cmath>
#include<vector>
#include<string>
#include<cstring>
#include<deque>
#include<queue>
#include<list>
#include<algorithm>
using namespace std;
int main()
{
 //problem d
   int counter=0,counter2=0;
   string s;
    cin>>s;
int sizer=s.size();
for(int i=0;i<sizer;i++)
{
    if(s[i]=='C')counter++;
    if(islower(s[i]))counter2++;

}
if(s[0]='A'&&s[2]=='C'&&counter2==sizer-2&&counter==1||s[s.size()-1]=='C')
   cout<<"AC";
else
        cout<<"WA";

return 0;

}