Ключевые слова: advice, advisor, aid, answer, answering, answers, ask, asking, assist, assistance, assisting, background, blackboard, communicate, communication, concept, conceptual, confuse, confused, confusing, confusion, consult, consulting, customer, find, finding, get, guidance, guide, guiding, help, helping, illustrated, money, need, needs, note, notes, question, questions, service, solution, solve, solving, sos, support, supporting, word, words,