root position / 1st inversion . root position-b 1st inversion-b 1 1a s2 2a s3 3a s4 4a s5 5a s6 6a s ... © Nikos Drelas root position-b 1st inversion-b 1 1a s2 2a s3 3a s4 4a s5 5a s6 6a s