B1 B2 B3 B4 B5 B6 B7 -- B8 B9 B10 B11 ------------ B12 B13 B14 B15 -------------------------- B16 ----- B17 B18 B19 B20
|
J1
J2
J3
J4 -------
J5
J6
J7
J8 ----
J9
J10
J11
J12
J13 ---
J14 ---
J15
J16
J17
J18
J19
J20 ---
J21 ---
J22
J23----------
J24----------------
J25---------------- --------------------- |