Each part has six sides, and they lie in a cross: on top - top and bottom, below them from left to right - right side, before, left side and backI don't know. If you look at the area, you'll see what that is. The right and left are on the side of the character: the right hand on the picture face to you, on the left.
The top half of the picture (up to y = 32) is what was in the old format 64 x 32: head, torso, right arm and leg. The left arm and leg and the second layer of torso and limbs appeared in 64 x 64 and lie in the lower half.

