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Kelly bought some buns and gave half of them to Lionel. Lionel bought some sweets and gave half of them to Kelly.
Kelly ate 10 sweets and Lionel ate 22 buns.
As a result, the ratio of the number of sweets to buns Kelly had left became 1:7 and the ratio of the number of sweets to buns Lionel had left became 1: 5.
How many sweets did Lionel buy?