K_1: labels read from the TeX coordinates: a b a e c b d f d g e g c f
    chords (endpoint positions): a 0-2, b 1-5, e 3-10, c 4-12, d 6-8, f 7-13, g 9-11
    coloured chords: ['c', 'e', 'g']  even chord: ['e']
    triangle edges (arcs): 3-4 (ec), 9-10 (ge), 11-12 (gc)
    agrees with the Gauss word and its triangle: True
K_2: labels read from the TeX coordinates: a b a c e b d f d e g c g f
    chords (endpoint positions): a 0-2, b 1-5, c 3-11, e 4-9, d 6-8, f 7-13, g 10-12
    coloured chords: ['c', 'e', 'g']  even chord: ['e']
    triangle edges (arcs): 3-4 (ce), 9-10 (eg), 11-12 (cg)
    agrees with the Gauss word and its triangle: True
FIGURE CHECK PASSED
