1234567891011main() { a, b, c, d := mix4(1, 2, 3, 4) assert a == 4 + 1 assert b == 3 + 2 assert c == 2 + 3 assert d == 1 + 4}mix4(x int, y int, z int, w int) -> (int, int, int, int) { return w + x, z + y, y + z, x + w}
