def METHOD_NAME(x1,v1,x2,v2,u):
    """Returns the position a hermite curve with control points
    x1, v1, x2, v2 at the parameter u in [0,1]."""
    assert len(x1)==len(v1)
    assert len(x1)==len(x2)
    assert len(x1)==len(v2)
    u2 = u*u
    u3 = u*u*u
    cx1 = 2.0*u3-3.0*u2+1.0
    cx2 = -2.0*u3+3.0*u2
    cv1 = (u3-2.0*u2+u)
    cv2 = (u3-u2)
    x = [0]*len(x1)
    for i in range(len(x1)):
        x[i] = cx1*x1[i] + cx2*x2[i] + cv1*v1[i] + cv2*v2[i]
    return x