(From RIGHT to LEFT): Sahmech, Aleph, Tahv. Unfortunately I cannot create these Hebrew characters here, so I'll describe them. Sahmech is like a capital D with a little 'horn' on the top left. Aleph is like an X, but more curved, like an x chromosome (if you can imagine a figure 8 with the very top and the very bottom removed). Tahv looks like a capital L turned 180 degrees with a lower case j attached, so that the whole character looks like a table with one (left hand) leg bent. Hope I've helped.