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#!/usr/bin/perl
use strict;
...
    }
    return 0;
}

#!/usr/bin/perl
use strict;
...
    }
    return 0;
}

import java.io.File;
import java.io.IOException;
...
        return sum;
    }
}

#!/usr/bin/perl
use strict;
...
    
    return ret_sv;
}

import java.io.File;
import java.io.IOException;
...
        return sum;
    }
}

#!/usr/bin/perl
use strict;
...

my %rev = reverse %fwd;
store \%rev, 'sol.rev';

#!/usr/bin/perl
use strict;
...
    $dbh->do($sql) or die $dbh->errstr;
}
$dbh->disconnect or die $dbh->errstr;

#!/usr/bin/perl -T
use strict;
...
    my %uniq = map {$_ => undef} split //, $input;
    return join '', sort keys %uniq;
}

<html>
<head><title>How many words does it take.....</title></head>
...
</center>
</body>
</html>

<html>
<head><title>It takes.....</title></head>
...
</center>
</body>
</html>