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 (GCC 5.4.1) (judge verdict: Accepted)

#include<stdio.h>
int count(char *ary);

int main()
{
  int i, length, countC = 0, counts = 0;
  char ary[11];
  scanf("%s", ary);

  // printf("%s\n", ary);
  
  length = count(&ary[0]);

  // printf("length=%d\n", length);

  if(ary[0] == 'A'){
    for(i = 2; i < length - 1; ++i){
      if(ary[i] == 'C') ++countC;
    }

    // printf("countC=%d\n", countC);
    
    if(countC == 1){
      for(i=0; i<length; ++i){
	if((int)ary[i] > 90) ++counts;
	// printf("counts=%d\n", counts);
      }
      if(counts == length - 2) printf("AC\n");
      else printf("WA\n");
      
    }else printf("WA\n");
    

  }else printf("WA\n");



  return 0;
}

int count(char *ary){
  int i, count=0;
  for(i=0; i<11; ++i){
    if(*(ary+i) == '\0') break;
    else  ++count;
  }

  return count;
}