﻿ ABC104 B - AcCepted - Atcoder

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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.