YOU SAID:

I slept in the train station on a futon

INTO JAPANESE

私は布団の上で電車の駅で寝た

BACK INTO ENGLISH

I slept on a futon at the train station

INTO JAPANESE

私は駅の布団の上で寝た

BACK INTO ENGLISH

I slept on a futon at the station

INTO JAPANESE

私は駅の布団の上で寝た

BACK INTO ENGLISH

I slept on a futon at the station