Thirteen

Eight plus Four Plus One

Twelve

Here is twelve! I have drawn the little and index fingers curled halfway back, lest anyone mistaken the gesture to respresent anything occultic. Note: "Twelve" is simple "Six" moved to the left one digit, and "Three" moved to the left two digits. In other words, in the case of three, six, and twelve, two adjacent (i.e. "side-by-side") digits are completely pulled in.