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.

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.

Constraints

• 4 ≤ |S| ≤ 10 (|S| is the length of the string S.)
• Each character of S is uppercase or lowercase English letter.

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.

见题面 Input 部分

见题面 Output 部分