Ключевые слова: abstract, acknowledgment, adorable, announcement, appreciation, background, blue, business, card, comment, communicate, concept, congratulations, feedback, giving, grateful, gratitude, greeting, hand, handwriting, headline, letter, message, note, paper, regard, reminder, reply, respond, response, satisfaction, sentiment, sheet, sign, text, thank, thank you, thanksgiving, type, white, word, write, you,