YOU SAID:

they could turn north or south but they decided not

INTO JAPANESE

彼らはしないことを決めたが、彼らは北に回すことができるまたは南

BACK INTO ENGLISH

They decided not to, they're could turn to the North or South

INTO JAPANESE

彼らは彼らはしないように決めた北または南へ回すことができます。

BACK INTO ENGLISH

You can turn decided they they are not North or South.

INTO JAPANESE

彼らは北または南、決定の無効にできます。