Ключевые слова: achievement, ascend, ascent, background, backgrounds, challenge, challenging, chanced, climb, coming, concept, conceptual, endless, flight of steps, future, get, go, idea, infinite, infinity, ladder, lift, long, occurred, over, red, rise, scala, scale, stair, staircase, stairs, stairway, stairways, step, steps, success, unending, uphill,