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-----
AtCoder

-----Sample Output-----
AC

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

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