Ключевые слова: asphalt, background, black, boots, brown, canada, city, cold, color, day, dirt, dirty, ecology, foot, footprint, footprints, footprints on dirty snow, frost, frozen, ground, ice, icy, mud, outdoor, outside, people, puddle, reflection, road, russia, season, shoe, sidewalk, snow, step, street, surface, trace, urban, walk, walkway, water, way, weather, white, winter,