An etude for octaves, contrasting motion of both hands, and rapid position shifts. The theme features a sequential melody embedded within a delicate arabesque of 16th notes (measures 1-2, right hand: e-a; d-g; c-f; h-e). This theme recurs in the A' section of the A-B-A' form, but when presented for the final time, a C-sharp appears, blurring the distinction between A major and A minor, creating an unexpected effect. The character is Molto allegro energico (very lively, energetic), but it requires the subtlety of highlighting the melody (phrase) by considering the balance between voices, rather than playing the melody, bass, and inner voices with equal strength throughout.