use strict;
my ($inputfile, $outputfile) = @_;
open (OUT, ">$outputfile") || die "could not open $outputfile\n";
open (IN, "<$inputfile") || die "could not open $inputfile\n";
while (<IN>) {
    chomp;                     # no newline
    s/^--.*//;                 # no oracle comments
    s/^prompt.*//;             # no oracle prompt lines
    s/^\s+//;                  # no leading white
    s/\s+$//;                  # no trailing white
    s/\s+/ /;                  # replace series of white with one space
    next unless length;        # anything left?
    print OUT $_, "\n";
}
close IN;
close OUT;