1
2.SECONDEXPANSION:
3all: bye.x
4%.x: $$(wordlist 1, 99, $$(wordlist 1, 99, %.1 %.2)) $$(wordlist 1, 99, $$(wordlist 1,99, %.3 %.4)); $(info $@ from $^)
5.PHONY: bye.1 bye.2 bye.3 bye.4