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#!/usr/bin/perl

...
  sleep 1 + int rand 3;
  print time, " pid $$ ending on (@_)\n";
  }

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1678877305 pid 65651 starting on (opts 1)
1678877305 pid 65652 starting on (opts 2)
...
1678877311 pid 65657 starting on (opts 7)
1678877312 pid 65656 ending on (opts 6)
1678877313 pid 65657 ending on (opts 7)