To move up or down the stairs one at a time, one step at a time and pace. Once the three layers do not stride will make making a living is not successful. That you do not like anything, you need to. Don't do anything beyond the ability or skip steps.
To step up or down stairs Step by step, step by step, do not quite three layers. Failed to make a living like that will not do anything. A gradual, do not do anything to excess capacity. Or skip