Ключевые слова: abstract, cancel, check, choice, close, color, concept, cross, decision, decisioncross, delete, denied, design, editable, election, element, error, fail, flat, graphic, icon, illustration, incorrect, isolated, mark, negative, negativity, no, option, poll, red, reject, shape, sign, signal, simple, stop, symbol, test, urban, vote, wall, web, white, wrong, x,