Ключевые слова: alphabet, back, basic, belief, block, business, class, communication, concept, consult, core, educate, education, elementary, essential, general, help, important, knowledge, language, learn, learning, lesson, letter, made, message, mission, note, origin, primary, programming, quote, return, school, science, sign, simple, simplicity, start, strategy, student, symbol, teach, teaching, text, training, wood, word,