Meromorphic functions sharing small functions

Let f and g be meromorphic functions sharing four small functions a(1), a(2 ), a(3), a(4) ignoring multiplicities. If there is a small function a(5) di stinct from a(j), j = 1, 2, 3, 4, such that (N) over bar (r, f = a(5) = g) not equal S(r, f), then f = g, where (N) over bar (r, f = a(5) = g) is the counting function of those common zeros of f(z) - a(5)(z) and g(z) - a(5)(z ) counted only once ignoring multiplicities.