请大家看下面的程序及运行结果，回答问题，谢谢！

我对这个问题有兴趣，重新运行了一下，结果真的不一样：Maybegins running
Step0:May,priority:10
Step1:May,priority:10
Step2:May,priority:10
Step3:May,priority:10
Step4:May,priority:10
Step5:May,priority:10
Step6:May,priority:10
Step7:May,priority:10
Step8:May,priority:10
Step9:May,priority:10
Step10:May,priority:10
Step11:May,priority:10
Step12:May,priority:10
Step13:May,priority:10
Step14:May,priority:10
Step15:May,priority:10
Step16:May,priority:10
Step17:May,priority:10
Step18:May,priority:10
Step19:May,priority:10
Step20:May,priority:10
Step21:May,priority:10
Step22:May,priority:10
Step23:May,priority:10
Step24:May,priority:10
Step25:May,priority:10
Step26:May,priority:10
Step27:May,priority:10
Step28:May,priority:10
Step29:May,priority:10
Step30:May,priority:10
Step31:May,priority:10
Step32:May,priority:10
Mayfinished
TOMbegins running
Step0:TOM,priority:5
Step1:TOM,priority:5
Step2:TOM,priority:5
Step3:TOM,priority:5
Step4:TOM,priority:5
Step5:TOM,priority:5
Makebegins running
Step0:Make,priority:5
Step1:Make,priority:5
Step2:Make,priority:5
Step3:Make,priority:5
Step4:Make,priority:5
Step5:Make,priority:5
Step6:Make,priority:5
Step7:Make,priority:5
Step8:Make,priority:5
Step9:Make,priority:5
Step10:Make,priority:5
Step11:Make,priority:5
Step12:Make,priority:5
Step13:Make,priority:5
Step14:Make,priority:5
Step15:Make,priority:5
Step16:Make,priority:5
Step17:Make,priority:5
Step18:Make,priority:5
Step19:Make,priority:5
Step20:Make,priority:5
Step21:Make,priority:5
Step22:Make,priority:5
Step23:Make,priority:5
Step24:Make,priority:5
Step6:TOM,priority:5
Step7:TOM,priority:5
Step8:TOM,priority:5
Step9:TOM,priority:5
Step10:TOM,priority:5
Step11:TOM,priority:5
Step12:TOM,priority:5
Step13:TOM,priority:5
Step14:TOM,priority:5
Step15:TOM,priority:5
Step16:TOM,priority:5
Step17:TOM,priority:5
Step18:TOM,priority:5
Step19:TOM,priority:5
Step20:TOM,priority:5
Step21:TOM,priority:5
Step22:TOM,priority:5
Step23:TOM,priority:5
Step24:TOM,priority:5
Step25:TOM,priority:5
Step26:TOM,priority:5
Step27:TOM,priority:5
Step28:TOM,priority:5
Step29:TOM,priority:5
Step30:TOM,priority:5
Step25:Make,priority:5
Step26:Make,priority:5
Step27:Make,priority:5
Step28:Make,priority:5
Step29:Make,priority:5
Step30:Make,priority:5
Step31:Make,priority:5
Step32:Make,priority:5
Makefinished
Step31:TOM,priority:5
Step32:TOM,priority:5
TOMfinished
Johnbegins running
Step0:John,priority:1
Step1:John,priority:1
Step2:John,priority:1
Step3:John,priority:1
Step4:John,priority:1
Step5:John,priority:1
Step6:John,priority:1
Step7:John,priority:1
Step8:John,priority:1
Step9:John,priority:1
Step10:John,priority:1
Step11:John,priority:1
Step12:John,priority:1
Step13:John,priority:1
Step14:John,priority:1
Step15:John,priority:1
Step16:John,priority:1
Step17:John,priority:1
Step18:John,priority:1
Step19:John,priority:1
Step20:John,priority:1
Step21:John,priority:1
Step22:John,priority:1
Step23:John,priority:1
Step24:John,priority:1
Step25:John,priority:1
Step26:John,priority:1
Step27:John,priority:1
Step28:John,priority:1
Step29:John,priority:1
Step30:John,priority:1
Step31:John,priority:1
Step32:John,priority:1
Johnfinished