B - AcCepted

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.

AtCoder

AC

The first letter is A, the third letter is C and the remaining letters are all lowercase, so all the conditions are satisfied.

ACoder

WA

The second letter should not be C.

AcycliC

WA

The last letter should not be C, either.

AtCoCo

WA

There should not be two or more occurrences of C.

Atcoder

WA

The number of C should not be zero, either.