#include<bits/stdc++.h>
using namespace std;

int main(){
  string s;cin>>s;
  int n=s.size();
  bool ans=1;
  int sum=0;
  for(int i=1;i<n;i++){ 
    if(i>1&&i<n-1&&s[i]=='C'){
      sum++;
      if(sum>1)ans=0;
      continue;
    }
    if('a'>s[i]||s[i]>'z')ans=0;
  }
  if(s[0]!='A'||s[1]=='C'||s[n-1]=='C'||sum==0)ans=0;
  cout<<(ans?"AC":"WA");
}

### Prompt

Please formulate a cpp solution to the following problem:

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(){
  string s;cin>>s;
  int n=s.size();
  bool ans=1;
  int sum=0;
  for(int i=1;i<n;i++){ 
    if(i>1&&i<n-1&&s[i]=='C'){
      sum++;
      if(sum>1)ans=0;
      continue;
    }
    if('a'>s[i]||s[i]>'z')ans=0;
  }
  if(s[0]!='A'||s[1]=='C'||s[n-1]=='C'||sum==0)ans=0;
  cout<<(ans?"AC":"WA");
}

```