"Geeh-tuhn" = 32 +16 = 48 decimal. Left thumb down, right little finger down. All other digits up. And, by the way, for this verse of Psalm 119, I always put my hands in the air; because it says:
"My hands also will I lift up unto thy commandments, which I have loved - and I will meditate in thy statutes."
Therefore, feel free to put those hands (the left one with the thumb down, and the right one with the little finger in - ...unless, of course, you are left handed), and say the above verse.