Ключевые слова: appreciate, appreciation, banner, billboard, black, board, business, businessman, card, comment, concept, customer, feedback, grateful, gratefulness, gratitude, handwriting, handwritten, holding, man, message, note, regard, remark, reply, respond, response, satisfaction, satisfied, service, showing, sign, student, text, thank, thank you, thankful, thankfulness, thanks, underlined, you,