"She didn't get along well with two teachers who taught her mid-day classes, and so she would leave after her morning classes, take a break and then come back for her afternoon classes, " Rhonda Beckford said.

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Friends who have known each other for decades, or siblings who get along well and are comfortable spending long periods of time with one another, would also be suitable for this sort of situation, said Jason Kring, assistant professor at Embry-Riddle Aeronautical University, who is not involved with the mission.

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