YOU SAID:

They’re failing to put their stuff over there.

INTO JAPANESE

彼らは自分たちのものをそこに置くことに失敗しています。

BACK INTO ENGLISH

They are failing to put their stuff there.

INTO JAPANESE

彼らはそこに自分の物を置くことに失敗しています。

BACK INTO ENGLISH

They are failing to put their stuff there.