12 int global;  variable
22   if (global++ > 0)  in start()
23       global++;  in start()
26   if (global++ > 0)  in start()
27       global++;  in start()
30   if (global++ > 0)  in start()
31       global++;  in start()
34   if (global++ > 0)  in start()
35       global++;  in start()
38   if (global++ > 0)  in start()
39       global++;  in start()
43   if (global++ > 0)  in start()
44       global++;  in start()
48   if (global++ > 0)  in start()
49       global++;  in start()
53   if (global++ > 0)  in start()
54       global++;  in start()
58   if (global++ > 0)  in start()
59       global++;  in start()
63   if (global++ > 0)  in start()
64       global++;  in start()
68   if (global++ > 0)  in start()
69       global++;  in start()
73   if (global++ > 0)  in start()
74       global++;  in start()
78   if (global++ > 0)  in start()
79       global++;  in start()
83   if (global++ > 0)  in start()
84       global++;  in start()
88   if (global++ > 0)  in start()
89       global++;  in start()
93   if (global++ > 0)  in start()
94       global++;  in start()
98   if (global++ > 0)  in start()
99       global++;  in start()
103   if (global++ > 0)  in start()
104       global++;  in start()