sleep,a,they,day,hours,twenty 连词成句
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sleep,a,they,day,hours,twenty连词成句sleep,a,they,day,hours,twenty连词成句sleep,a,they,day,hours,twenty连词成句t
sleep,a,they,day,hours,twenty 连词成句
sleep,a,they,day,hours,twenty 连词成句
sleep,a,they,day,hours,twenty 连词成句
they sleep twenty hours a day.