watch、where、that、加减或更换一个字母,使所给的词变为一个新单词。

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catch/witch(女巫）/match（比赛纳歼）拆袜
here、there，were、
what、than、洞御冲hat，chat

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watch-->catch
where-->there
that-->than

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catch
were,here
what,hat

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