Types of 2-factorisations of <{1,2,3,4}>_{9}. Label 2-factor A C3C3C3 B C5C4 C C6C3 D C9 The following nine types do not exist: AAAB AAAC AAAD AABB AABC AABD AACD ABCC BBBB The following types exist: AAAA (0,1,2)(3,4,5)(6,7,8) (0,3,6)(1,4,7)(2,5,8) (0,4,8)(1,5,6)(2,3,7) (0,5,7)(1,3,8)(2,4,6) AACC (0,1,2)(3,4,5)(6,7,8) (0,3,6)(1,4,7)(2,5,8) (0,4,2,6,5,7)(1,3,8) (0,5,1,6,4,8)(2,3,7) AADD (0,1,2)(3,4,5)(6,7,8) (0,3,6)(1,4,7)(2,5,8) (0,4,2,3,7,5,6,1,8) (0,5,1,3,8,4,6,2,7) ABBB (0,1,2)(3,4,5)(6,7,8) (0,3,1,4,6)(2,7,5,8) (0,4,2,6,5)(1,7,3,8) (1,5,2,3,6)(0,7,4,8) ABBC (0,1,2)(3,4,5)(6,7,8) (0,3,1,4,6)(2,7,5,8) (0,5,2,4,7)(1,6,3,8) (1,5,6,2,3,7)(0,4,8) ABBD (0,1,2)(3,4,5)(6,7,8) (0,3,1,4,6)(2,7,5,8) (0,4,7,1,8)(2,3,6,5) (0,5,1,6,2,4,8,3,7) ABCD (0,1,2)(3,4,5)(6,7,8) (0,3,1,4,6)(2,7,5,8) (0,5,1,7,4,8)(2,3,6) (0,4,2,5,6,1,8,3,7) ABDD (0,1,2)(3,4,5)(6,7,8) (0,3,1,4,6)(2,7,5,8) (0,4,2,5,6,3,7,1,8) (0,5,1,6,2,3,8,4,7) ACCC (0,1,2)(3,4,5)(6,7,8) (0,3,6,1,4,7)(2,5,8) (0,4,6,2,3,8)(1,5,7) (1,3,7,2,4,8)(0,5,6) ACCD (0,1,2)(3,4,5)(6,7,8) (0,3,1,6,4,7)(2,5,8) (0,4,8,1,5,6)(2,3,7) (0,5,7,1,4,2,6,3,8) ACDD (0,1,2)(3,4,5)(6,7,8) (0,3,1,6,4,7)(2,5,8) (0,4,1,5,6,2,7,3,8) (0,5,7,1,8,4,2,3,6) ADDD (0,1,2)(3,4,5)(6,7,8) (0,3,1,4,6,2,7,5,8) (0,4,2,5,6,1,8,3,7) (0,5,1,7,4,8,2,3,6) BBBC (0,1,2,3,4)(5,6,7,8) (0,2,4,5,7)(1,6,3,8) (0,3,7,1,5)(2,6,4,8) (1,3,5,2,7,4)(0,6,8) BBBD (0,1,2,3,4)(5,6,7,8) (0,2,4,5,7)(1,3,6,8) (0,3,5,1,6)(2,7,4,8) (0,5,2,6,4,1,7,3,8) BBCC (0,1,2,3,4)(5,6,7,8) (0,2,5,3,6)(1,7,4,8) (0,3,7,2,6,8)(1,4,5) (1,3,8,2,4,6)(0,5,7) BBCD (0,1,2,3,4)(5,6,7,8) (0,2,4,5,7)(1,3,6,8) (0,5,2,7,3,8)(1,4,6) (0,3,5,1,7,4,8,2,6) BBDD (0,1,2,3,4)(5,6,7,8) (0,2,4,5,7)(1,3,6,8) (0,3,5,1,6,2,7,4,8) (0,5,2,8,3,7,1,4,6) BCCC (0,1,2,3,4)(5,6,7,8) (0,2,4,1,5,7)(3,6,8) (0,6,2,5,4,8)(1,3,7) (1,6,4,7,2,8)(0,3,5) BCCD (0,1,2,3,4)(5,6,7,8) (0,2,4,1,5,7)(3,6,8) (0,5,2,6,4,8)(1,3,7) (0,3,5,4,7,2,8,1,6) BCDD (0,1,2,3,4)(5,6,7,8) (0,2,4,1,5,7)(3,6,8) (0,3,5,2,6,4,7,1,8) (0,5,4,8,2,7,3,1,6) BDDD (0,1,2,3,4)(5,6,7,8) (0,2,4,1,5,7,3,6,8) (0,3,5,2,6,4,8,1,7) (0,5,4,7,2,8,3,1,6) CCCC (0,1,2,3,4,5)(6,7,8) (0,2,4,6,1,7)(3,5,8) (0,4,7,3,1,8)(2,5,6) (1,4,8,2,7,5)(0,3,6) CCCD (0,1,2,3,4,5)(6,7,8) (0,2,4,6,1,7)(3,5,8) (0,3,7,2,5,6)(1,4,8) (0,4,7,5,1,3,6,2,8) CCDD (0,1,2,3,4,5)(6,7,8) (0,2,4,6,1,7)(3,5,8) (0,3,1,4,7,5,6,2,8) (0,4,8,1,5,2,7,3,6) CDDD (0,1,2,3,4,5)(6,7,8) (0,2,4,1,6,3,7,5,8) (0,3,1,5,6,4,8,2,7) (0,4,7,1,8,3,5,2,6) DDDD (0,1,2,3,4,5,6,7,8) (0,2,4,1,3,6,8,5,7) (0,3,5,1,7,2,8,4,6) (0,4,7,3,8,1,6,2,5)