Ключевые слова: abstract, background, boot, bootprint, building, cement, concrete, construction, detail, dirty, feet, foot, footgear, footprint, footstep, footwear, going, gray, grey, hardened, human, imprint, industrial, industry, man, mark, mortar, old, passing, pattern, people, person, print, rock, scent, shoe, sign, sneakers, sole, solid, step, stone, surface, texture, trace, track, trainers, vestige, walking, woman,