Let $K$ be a knot in $S^3$. It is well-known that the knot $K \# -\overline{K}$ is always ribbon.

The following picture describes the connected sum of the left-handed torus knot $T(3,4)$ and the right-handed torus knot $T(3,4)$. In Rolfsen's notation, $T(3,4) = 8_{19}$, for several descriptions see [1] and [2].

I would like to find the ribbon move(s) for this composite knot but I could not elaborate.

Is there an easy way to see this or any trick to figure out the necessary ribbon moves?