Each cylinder has mass M/4, radius R, length L.
Axis through midpoints of top and bottom sides (along y-direction).
Top/bottom cylinders (perpendicular to axis, axis through midpoint):
I=4McR2+12McL2 each.
Left/right cylinders (parallel to axis, distance L/2 from it):
I=2McR2+Mc(L/2)2 each.
Total =2(4McR2+12McL2)+2(2McR2+4McL2)
=2M(43R2+3L2)=83MR2+6ML2.