0 used between possibilities, or before the last of many possibilities -- o, oppure
1 used after a negative verb to mean not one thing and also not another -- né
3 used to change or correct something you have said -- o almeno
4 used to show an alternative -- o
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.
Possiamo completarlo passo dopo passo, indipendentemente dalla lunghezza della strada, e non può essere completato, per quanto breve sia la strada, se non segni nemmeno la tua impronta.