 γ  T1 (m_1, chords_1, model)         T2 (k_2, chords_2, model)          |S1|   |S2|    3^γ    fwd    rev  compat?
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 3  (3, —, SR)                        (3, —, SR)                           27     27     27     27     27      YES
 3  (3, —, SR)                        (4, [(0, 2)], SP)                    27     24     27     24     24      YES
 3  (3, —, SP)                        (3, —, SP)                            6      6     27      6      6      YES
 3  (3, —, SP)                        (4, [(0, 2)], SP)                     6     24     27      6      6      YES
 4  (4, —, SR)                        (4, —, SR)                           81     81     81     81     81      YES
 4  (4, [(0, 2)], SP)                 (4, [(0, 2)], SP)                    36     54     81     36     36      YES
 4  (4, [(0, 2)], SP)                 (4, —, SR)                           36     81     81     36     36      YES
 4  (4, —, SR)                        (4, [(0, 2)], SP)                    81     54     81     54     54      YES
 4  (3, [(0, 2)], SP)                 (4, [(0, 2)], SP)                    36     54     81     36     36      YES
 4  (4, [(0, 2)], SP)                 (5, [(0, 2)], SP)                    36     36     81     12     12      YES
 4  (4, [(0, 2)], SP)                 (6, [(0, 3)], SP)                    36     15     81      6      6      YES
 4  (4, [(0, 2)], SP)                 (6, [(0, 2), (3, 5)], SP)            36     81     81     36     36      YES
 5  (5, [(0, 2)], SP)                 (3, —, SR)                           36    171    243     18     18      YES
 5  (5, [(0, 2)], SP)                 (5, [(0, 2)], SP)                    36     90    243     36     36      YES
 5  (5, [(0, 2)], SP)                 (5, [(0, 3)], SP)                    36     90    243     36     36      YES
 5  (5, [(0, 3)], SP)                 (5, [(0, 3)], SP)                    36     90    243     36     36      YES
 5  (5, [(0, 2)], SR)                 (5, [(0, 2)], SP)                   243     90    243     90     90      YES
 6  (6, [(0, 3)], SP)                 (6, [(0, 3)], SP)                    36     90    729     36     36      YES
 6  (6, [(0, 3)], SP)                 (6, [(0, 2), (3, 5)], SP)            36    456    729     36     36      YES
 6  (6, [(0, 2), (3, 5)], SP)         (6, [(0, 2), (3, 5)], SP)           216    456    729    216    162      YES
 6  (6, [(0, 3)], SP)                 (3, —, SR)                           36    396    729      6      6      YES
 6  (6, [(0, 2), (3, 5)], SP)         (3, —, SR)                          216    396    729    108    108      YES
 6  (6, [(0, 2), (3, 5)], SP)         (4, [(0, 2)], SP)                   216    342    729    108     90      YES
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23/23 compatible.
