Check Alternating Strings

You are given an integer \(T\) representing the number of test cases. For each test case, a string \(s\) is provided. Your task is to determine whether the string is alternating, meaning that no two consecutive characters in \(s\) are the same. Formally, for a string \(s\) of length \(|s|\), it must satisfy the condition:

$$\forall i\;(2 \le i \le |s|):\ s_i \neq s_{i-1}$$

Output YES if the string meets this condition and NO otherwise. The answer is case-sensitive.

inputFormat

The input is given via standard input and has the following format:

• The first line contains an integer \(T\) representing the number of test cases.
• Each of the next \(T\) lines contains a non-empty string \(s\) consisting of only printable characters.

outputFormat

For each test case, print on a new line YES if the characters of the string alternate (i.e., no two consecutive characters are the same), otherwise print NO.

## sample

1
abab

YES

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