B major pentatonic

B1C♯2D♯3F♯5G♯6

The major scale without its two half steps. Five notes, and no pair of them a half step apart.

Written out

Fig. 2 · B major pentatonic, ascending

Every accidental is written in, rather than left to a key signature, so the letters can be read one at a time.

BWC♯WD♯W+HF♯WG♯W+HB

B major pentatonic is B, C♯, D♯, F♯ and G♯, and back to B.

Its steps are W – W – W+H – W – W+H, where W is a whole step and H a half.

Across the first twelve frets of the ukulele its notes fall in 20 places, which is what makes a scale a shape rather than a list.

Found by testing every chord in the catalogue against these 5 sounds, not chosen.