CON'tract (noun) - has emphasis on the first syllable
conTRACT (verb) - has emphasis on the second syllable.
Some words are like this in English.
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I bought a Star Trek CD today.
This blog is mainly to explain a different English language expression every day. Sometimes I post other stuff. I also have a YouTube channel which is mostly about computer software: https://www.youtube.com/englishspacedog