Free falling physics question?

Two identical pellet guns are fired simultaneously from the edge of a cliff. These guns impart an initial speed of 32.5 m/s to each pellet. Gun A is fired straight upward, with the pellet going up and then falling back down, eventually hitting the ground beneath the cliff. Gun B is fired straight downward. In the absence of air resistance, how long after pellet B hits the ground does pellet A hit the ground?