Duplicate Character Checker

You are given a string and your task is to determine whether it contains any duplicate characters. For each test case, output YES if there is at least one character that appears more than once in the string, otherwise output NO.

The challenge helps you practice basic string manipulation and use of data structures such as sets or arrays for frequency counting.

Note: The solution must read from standard input (stdin) and write the result for each test case to standard output (stdout).

inputFormat

The first line contains an integer T, the number of test cases. Each of the following T lines contains a non-empty string.

Example:

3
abc
hello
world

outputFormat

For each test case, output a single line containing YES if the corresponding string contains any duplicate characters, or NO otherwise.

Example:

NO
YES
NO

## sample

3
abc
hello
world

NO
YES
NO

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