Ключевые слова: background, block, blocks, bowl, clean, cleanliness, concept, construction, disease, domestic, end, everyday, fun, happy, health, help, home, hygiene, inquiries, knowledge, life, lifestyle, living, maintenance, manners, natural, problem, question, questionnaire, remodeling, repair, restroom, sanitary, save, seat, support, toilet, toys, trouble, wc, wooden,