Problem: Thecenterpoleis+andthemetalaroundthe+poleisthe-pole,i.e.bothendshasbotha+and-pole.
What's a sentence that uses these characters?
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The center pole is + and the metal around the + pole is the - pole, i.e. both ends has both a + and - pole.

Problem: Surgeryisapreferredoptionwherethebulkofthecancercanberemoved.
What's a sentence that uses these characters?
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Surgery is a preferred option where the bulk of the cancer can be removed.

Problem: Averysimpleexampleofacheapandeffective"aircollector"madeyourself:
What's a sentence that uses these characters?
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A very simple example of a cheap and effective "air collector" made yourself:

Problem: ThesamegoesfortheancientDanishKingSkjold!
What's a sentence that uses these characters?
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The same goes for the ancient Danish King Skjold!