. . . "Four sketches : for flute, violin, and piano (or 2 violins and piano)" . . . . "Four sketches, for flute, violin and piano, or 2 violins and piano" . . . . "Four sketches for flute, violin and piano (or 2 violins and piano)" . . . . . "Four sketches : for flute, violin and piano (or 2 violins and piano)" . . . . .