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-er, -est
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slower, slowest, colder, coldest
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sharper, sharpest, newer, newest
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smaller, smallest, longer, longest
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shorter, shortest, louder, loudest
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harder, hardest, brighter, brightest
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softer, softest, lower, lowest
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higher, highest, taller, tallest
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older, oldest, faster, fastest
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smarter, smartest, quicker, quickest
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