Chords for Angela Aki - 手紙~拜啟 給十五歲的你~ 電影《再會吧！青春小鳥》主題曲 (). Spark is the smartest and most interesting app to learn and enjoy playing guitar. Spark is an all-around app for beginners and advanced players to learn any song with chords or master new skills with hundreds of lessons and games in Spark.