1start 0
2start 1
3start 2
4done 0
50 cancels 1
6start 0
7cancelled 1
81 cancels 0
9start 1
10done 2
11start 2
12cancelled 0
130 cancels 1
14start 0
15cancelled 1
161 cancels 0
17start 1
18done 2
19start 2
20cancelled 0
210 cancels 1
22cancelled 1
231 cancels 0
24done 2
25