To move up or down first. Should step down. Don't step three at once will do no good to earn a living, to protect them from danger, and warned that if they do anything, gradually. Don't do anything to excess and do not skip like it to move up and down the stairs step by step. Otherwise, it may cause harm to ourselves and to teach, think what you do know that the contemplated should make a. Should not do anything to cross step.
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