1
2.SECONDEXPANSION:
3all: 2.x 1.x
42.x: 5.z 6.z 5.z | 7.z 7.z 8.z
51.x: 1.z 2.z 2.z | 3.z 4.z
6%.x: 9.z $$(info @=$$@,<=$$<,^=$$^,+=$$+,|=$$|,?=$$?,*=$$*) ;
7%.z: ;