Symphony No. 15 in A Major, Op. 141 - I. Allegretto (Shostakovich: 1. Allegretto [Symphony No.15, Op.141]|Ｓｈｏｓｔａｋｏｖｉｃｈ：　１．　Ａｌｌｅｇｒｅｔｔｏ　［Ｓｙｍｐｈｏｎｙ　Ｎｏ．１５，　Ｏｐ．１４１］)