C u 6

C u 6C u 6C u 6C u 6C u 6C u 6
C u 6C u 6C u 6C u 6C u 6C u 6
C u 6C u 6C u 6C u 6C u 6C u 6C u 6C u 6C u 6C u 6C u 6C u 6C u 6C u 6C u 6C u 6C u 6C u 6C u 6C u 6C u 6C u 6C u 6C u 6C u 6C u 6C u 6C u 6C u 6C u 6C u 6C u 6C u 6C u 6C u 6C u 6