N 4 x r

N 4 x rN 4 x rN 4 x rN 4 x rN 4 x rN 4 x r
N 4 x rN 4 x rN 4 x rN 4 x rN 4 x rN 4 x r
N 4 x rN 4 x rN 4 x rN 4 x rN 4 x rN 4 x rN 4 x rN 4 x rN 4 x rN 4 x rN 4 x rN 4 x rN 4 x rN 4 x rN 4 x rN 4 x rN 4 x rN 4 x rN 4 x rN 4 x rN 4 x rN 4 x rN 4 x rN 4 x rN 4 x rN 4 x rN 4 x rN 4 x rN 4 x rN 4 x rN 4 x rN 4 x rN 4 x rN 4 x rN 4 x rN 4 x r