Each Friday morning I post a riddle to get you to think outside the box and exercise your brain. If you are stumped, share it with a friend or colleague and see if you can figure out the answer together. Leave your guess in the comment section.
This week’s riddle: I appear infrequently in summer, twice as often in autumn, and never in the spring or winter. What am I?
I’ll approve responses later in the day to allow people to respond without seeing any spoilers.
BosGuy 
The letter U
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the letter U?
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The letter “u”
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The letter “U”. 😎
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the letter “u”
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the letter “u”
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The letter ‘u’.
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Coloured leaves or a light jacket.
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The letter U
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The letter “u”
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the letter u
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U❤️
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The letter U!
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the letter U
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