Mei-Shun recently noticed that “Clair de Lune” composed by Master C. Debussy has the same melody in soprano and bass keys of 2 bars on the 2nd page. This beautiful score consists of chords and single notes at a ratio of 5 : 1, requires all 10 fingers to move through 6 pages. When her ears catch something weird, either of little ones tends to press wrong place.