This page, which describes the move known as a Y-step, is part of the Turnstep Dictionary at www.turnstep.com.
A Y-step starts by stepping up wide on the bench like a V-step does, then the feet are brought together, then they step down, and finally the step back up. Variations include doing a single jumping jack for the final two counts instead of stepping back up on the bench.
The picture shows a right lead Y-step, and then a left lead Y-step. Notice that this move ends on top of the bench.
This move is done in 8 counts: