How about

foreach my $key(sort keys %hash){......}
#or numeric sort
foreach my $key(  sort {$a<=>$b} keys %hash){......}
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if you want them in the exact insertion order

my $index=0;
for(1..100){
$hash{$index}{'input1'} = $input1;
$hash{$index}{'input2'} = $input2;
#etc......
$index++;
}
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hashes are so flexible, you just need to figure out the scheme you need.