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 JavaScript (node.js v5.12) (judge verdict: Wrong Answer)

// inputに入力データ全体が入る
function Main(input) {
	// 1行目がinput[0], 2行目がinput[1], …に入る
	input = input.split("\n");
    tmp0 = input[0].split(" ");
    　s = tmp0[0].trim(); //'abcdef'
      var len=s.length-3;cnt=0;wa=0;

      if(s.substr(0,1)=='A'){
               for(i=2;i<s.length-2;i++){
                 if(s.substr(i,1)=='C'){cnt+=1;
                                        if(cnt==2){break;}}
                                      
                    }
                  }else{var cnt=2;}
 // console.log(cnt);
      if(cnt==2||cnt==0){console.log('WA')}
       else{
      var c=0;
    for(l=0;l<s.length;l++){ 
 // console.log(s);
       
     const STR = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
       for (i = 0; i < STR.length; i++) {if (s.substr(l,1) == STR[i]) {c+=1;}}
                  }
      
             if(c==2){console.log('AC');}
                else{console.log("WA")}
                }
                }
//*この行以降は編集しないでください（標準入出力から一度に読み込み、Mainを呼び出します）
Main(require("fs").readFileSync("/dev/stdin", "utf8"));