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CF1948A.Special Characters
Special Characters
You are given an integer .
Your task is to build a string of uppercase Latin letters. There must be exactly special characters in this string. Let's call a character special if it is equal to exactly one of its neighbors.
For example, there are special characters in the AAABAACC string (at positions: , , , , and ).
Print any suitable string or report that there is no such string.
Input
The first line contains a single integer () — the number of test cases.
The only line of each test case contains a single integer ().
Output
For each test case, print the answer as follows:
- if there is no suitable string, print one line containing the string
NO; - otherwise, print two lines. The first line should contain the string
YES; on the second line print a string of length at most — the answer itself (it can be shown that if some answers exist, then there is an answer of length at most ). If there are several solutions, print any of them.
Samples
3
6
1
2
YES
AAABAACC
NO
YES
MM
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