The second strain of this mazurka is a transposed variant of the first strain. Both are framed by a simple ascending Urlinie from ^5 to ^8. The internal elaboration in the first phrase of each strain is a neighbor note figure that brings considerable expressive emphasis to ^6, presaging its essential role in the cadence. The overall treatment of ^6, then, is very close to Schubert's in D779n13 (link).