Ключевые слова: address, anniversary, berlin, bill, business, card, celebration, communication, concept, congratulation, copy space, correspondence, delivery, design, document, email, exchange, german, german flag, germany, germany flag, green, greeting, investment, invitation, leaves, letter, letter of happiness, mail, massage, message, modern, national, national holiday, nationality, notebook, paper, payment, pen, pictogram, post office, postage, postcard, registration, relaxing, retro postage, spa, symbol, tourism,