#include <bits/stdc++.h>
using namespace std;
int main(void) {
    string s;
    cin >> s;
    smatch mat;
    if (regex_search(s, mat, regex("^A[a-z]+C[a-z]+$"))) {
        cout << "AC\n";
    } else {
        cout << "WA\n";
    }
    return 0;
}

### Prompt

Develop a solution in Cpp to the problem described below:

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`.

Examples

Input

AtCoder


Output

AC


Input

ACoder


Output

WA


Input

AcycliC


Output

WA


Input

AtCoCo


Output

WA


Input

Atcoder


Output

WA

### Response

```cpp
#include <bits/stdc++.h>
using namespace std;
int main(void) {
    string s;
    cin >> s;
    smatch mat;
    if (regex_search(s, mat, regex("^A[a-z]+C[a-z]+$"))) {
        cout << "AC\n";
    } else {
        cout << "WA\n";
    }
    return 0;
}

```