import "hashes/sha256/512bitPacked.code" as sha256packed

def main(private field a, private field b, private field c, private field d) -> (field):
	h = sha256packed([a, b, c, d])
	h[0] == 263561599766550617289250058199814760685
	h[1] == 65303172752238645975888084098459749904
	return 1