1            11          21            31          41

2            12           22            32         42

3            13            23           33          43

4            14           24             34         44

5            15            25            35         45

6             16           26            36          46

7             17            27           37          47

8             18            28           38          48    

9             19            29           39           49 

10           20             30          40           50