20

   0  180  120    0    0    0    0    0    0  104  112    0    0  120    0
   0    0    0    0    0
 180    0   96 2445   78    0 1395    0  120  135    0    0    0    0    0
   0    0    0  690    0
 120   96    0    0    0  221    0    0  315  390    0    0    0 1305    0
   0    0    0 1365    0
   0 2445    0    0  108  570  750    0  234    0    0  140    0    0    0
   0    0  150 1575    0
   0   78    0  108    0    0  225  135    0  156    0    0    0    0  135
   0    0    0    0    0
   0    0  221  570    0    0  615    0    0    0    0   45    0    0    0
   0    0  105    0    0
   0 1395    0  750  225  615    0 2400    0  187    0    0    0   96    0
   0    0  165    0  375
   0    0    0    0  135    0 2400    0    0    0    0    0   60    0    0
   0    0    0  750 3345
   0  120  315  234    0    0    0    0    0    0    0    0    0  750    0
   0  750    0    0    0
 104  135  390    0  156    0  187    0    0    0   36 1200    0 1860  192
   0    0    0  525    0
 112    0    0    0    0    0    0    0    0   36    0  225    0  300   96
2250    0    0    0    0
   0    0    0  140    0   45    0    0    0 1200  225    0    0    0  165
   0 1500    0  840    0
   0    0    0    0    0    0    0   60    0    0    0    0    0  800  104
 600    0    0    0    0
 120    0 1305    0    0    0   96    0  750 1860  300    0  800    0  975
   0    0   90    0    0
   0    0    0    0  135    0    0    0    0  192   96  165  104  975    0
   0  525    0    0    0
   0    0    0    0    0    0    0    0    0    0 2250    0  600    0    0
   0 1200    0    0    0
   0    0    0    0    0    0    0    0  750    0    0 1500    0    0  525
1200    0    0  750    0
   0    0    0  150    0  105  165    0    0    0    0    0    0   90    0
   0    0    0  465    0
   0  690 1365 1575    0    0    0  750    0  525    0  840    0    0    0
   0  750  465    0    0
   0    0    0    0    0    0  375 3345    0    0    0    0    0    0    0
   0    0    0    0    0

0 1 2 3 1 2 3 4 2 3 4 5 3 4 5 6 4 5 6 7
1 0 1 2 2 1 2 3 3 2 3 4 4 3 4 5 5 4 5 6
2 1 0 1 3 2 1 2 4 3 2 3 5 4 3 4 6 5 4 5
3 2 1 0 4 3 2 1 5 4 3 2 6 5 4 3 7 6 5 4
1 2 3 4 0 1 2 3 1 2 3 4 2 3 4 5 3 4 5 6
2 1 2 3 1 0 1 2 2 1 2 3 3 2 3 4 4 3 4 5
3 2 1 2 2 1 0 1 3 2 1 2 4 3 2 3 5 4 3 4
4 3 2 1 3 2 1 0 4 3 2 1 5 4 3 2 6 5 4 3
2 3 4 5 1 2 3 4 0 1 2 3 1 2 3 4 2 3 4 5
3 2 3 4 2 1 2 3 1 0 1 2 2 1 2 3 3 2 3 4
4 3 2 3 3 2 1 2 2 1 0 1 3 2 1 2 4 3 2 3
5 4 3 2 4 3 2 1 3 2 1 0 4 3 2 1 5 4 3 2
3 4 5 6 2 3 4 5 1 2 3 4 0 1 2 3 1 2 3 4
4 3 4 5 3 2 3 4 2 1 2 3 1 0 1 2 2 1 2 3
5 4 3 4 4 3 2 3 3 2 1 2 2 1 0 1 3 2 1 2
6 5 4 3 5 4 3 2 4 3 2 1 3 2 1 0 4 3 2 1
4 5 6 7 3 4 5 6 2 3 4 5 1 2 3 4 0 1 2 3
5 4 5 6 4 3 4 5 3 2 3 4 2 1 2 3 1 0 1 2
6 5 4 5 5 4 3 4 4 3 2 3 3 2 1 2 2 1 0 1
7 6 5 4 6 5 4 3 5 4 3 2 4 3 2 1 3 2 1 0