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: Accepted)

#include<iostream>
#include<string>
using namespace std;

int main(void){
  char s[11];
  int i,j=0,k=0,l=0,m;
  
  cin>>s;
  for(i=0;i<11;i++){
    if(s[i]=='\0')
      break;
    j++;
  }
  if(s[0]!='A'){
    cout<<"WA"<<endl;
    return 0;
  }
  else{
    for(i=2;i<j-1;i++){
      if(s[i]=='C'){
        k++;
        m=i;
        break;
      }
    }
    
   if(k!=1){
      cout<<"WA"<<endl;
     return 0;
   }
    else{
      for(i=1;i<j;i++){
        if(i==m)
          continue;
        else if(s[i]+0>=97)
          l++;
      }
      
    }
  }
    cout<<(l==j-2?"AC":"WA")<<endl;
  
  return 0;
}