0 used after a verb or preposition to refer to a group of people, animals, or things that have already been talked about -- je, ich
1 used after a verb or preposition to refer to a person when you want to avoid saying 'him' or 'her' or when you do not know if the person is male or female -- go
We can complete it step by step however long the road is and it can't be completed however short the road is if you don't even mark your footprint.
Możemy go ukończyć krok po kroku, niezależnie od tego, jak długa jest droga, i nie da się go ukończyć, niezależnie od tego, jak krótka jest droga, jeśli nawet nie zaznaczysz swojego śladu.