my %data = (
  'tt.exe' => {
     ABC =>     [ 10, 4 ],
     def => [ 3, 2],
     ggg => [ 1  , 0],
  },
  'ww.exe' => {
     ABC => [ 430, 5],
     def => [ 33 , 10],
     ggg => [ 10 , 4],
  },
  'xx.exe' => {
     ABC => [ 60 , 22],
     def => [ 23 , 3],
     ggg => [ 11 , 10],
  },
);

$,=' ';
print "start and finish :", @{$data{'ww.exe'}->{def}}, "\n";