Input (grade 13): Showing off his humorous style, Brain performed a Leopold Mozart horn concerto on rubber hose pipes at a Gerard Hoffnung music festival in 1956, trimming the hose to length with garden shears to achieve the correct tuning.
Output (grade 6): Dennis played a Leopold Mozart horn concerto by blowing through rubber hose pipes. He cut the hose to the length he needed with garden shears so that it was perfectly in tune.