12 part; s = 3.123.3 Grandsire Single.
a = s1.s2.s3.s4.s5.s6.s7.s8.s9.s11.s12.s13.s14.s15.s16.s17.s18.s21.s22.s23.s24.s25.s26.s27.s28.s29.s31.s32.s33.s34.s35.s36.s37.s38.s41.s42.s43.s44.s45.s46.s47.s48.s49.s54
7 56s (0f,7b), 321 4-bell runs (152f,169b), Backrounds.