def body(state):
    (i, x, y, z) = state
    y = (x * x)
    z = (y * y)
    return ((i + 1), x, y, z)
def body(state):
    (i, x, y, z) = state
    y = (x * x)
    z = (y * y)
    return ((i + 1), x, y, z)