Variations on a Theme by Haydn, Op. 56a - Variation I: Poco più animato (Brahms: Variation I: Poco piu animato [Variations on a Theme by Haydn, Op.56a]|Ｂｒａｈｍｓ：　Ｖａｒｉａｔｉｏｎ　Ｉ：　Ｐｏｃｏ　ｐｉｕ　ａｎｉｍａｔｏ　［Ｖａｒｉａｔｉｏｎｓ　ｏｎ　ａ　Ｔｈｅｍｅ　ｂｙ　Ｈａｙｄｎ，　Ｏｐ．５６ａ］)