0 = s, z, soft c (zero)
1 = t, d (visual orientation, 1 is visually similar to the letters t & d)
2 = n (has 2 vertical strokes)
3 = m (has 3 vertical strokes)
4 = r (four - last letter is "r")
5 = l (left had finger and thumb make "L")
6 = j, sh, soft g (looks like cursive j)
7 = k, ck, hard c hard g ( ifyou lay 7 on left side forms 1/2 k)
8 = f, ph, v, w(the cursivesmall f is similar to 8)
9 = b, p(if you turn the 9 upside down looks like b or p)