10483: ABC104 —— B - AcCepted
[Creator : ]
Description
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.
- 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:
```
$S$
```
```
$S$
```
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.
- Each character of $S$ is uppercase or lowercase English letter.
Sample 1 Input
AtCoder
Sample 1 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.
Sample 2 Input
ACoder
Sample 2 Output
WA
The second letter should not be C.
Sample 3 Input
AcycliC
Sample 3 Output
WA
The last letter should not be C, either.
AtCoCo
WA
There should not be two or more occurrences of C.
Sample 4 Input
Atcoder
Sample 4 Output
WA
The number of C should not be zero, either.