120 Cactus doubles Alexander E. Holroyd % 1 % 2 % 3 % 4 12345 ----------------------- b b s 13524 q q x 51342 ----------------------- 3 part b = 2 for 3; q= 4 for 3; s = 2; x = 34; Cactus doubles: 5.1.3.5.1