1 2 3 4 5 6 ............................................................................... 1 ............................................................................ 2/3 ..................................................................... 3/4 ................................................................................ 4 ........................................................... 5 ............................................................................... 6 .................................................................................... 7 ................................................................................ 8 ............................................................................... 8 ........................................................................................ 9 ..................................................................... 9 .....................................................................................10 .........................................................11 * * II 3 4 5 6 1 2 7