Ключевые слова: black, blackboard, board, break, breakdown, business, cafe, chalk, chalkboard, class, close, closed, college, commerce, coronavirus, covid, covid19, drawing, drawn, education, end, finish, hand, handwritten, holiday, information, inscription, letter, lettering, lockdown, message, note, notice, outbreak, pandemic, quarantine, restaurant, school, script, shop, sign, signboard, study, table, text, white, word, write, written,