In this task, you are given a sentence. You must judge whether a single noun or verb has been replaced with another word with the same part of speech. The inversion would result in the sentence sounding unnatural, So unnatural sentences will be considered changed. Label the instances as "Original" or "Changed" based on your judgment.

[Q]: " Almost everything is paid for with vouchers or coupons that you buy from a guard . "
[A]: Original


[Q]: It 's a federal offense , " I eavesdropping on for added seriousness .
[A]: Changed


[Q]: His guides have probably sniffed out every clue in it .
[A]:
Changed