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open (DFILE,$dfile) or die "can not open";
open (SFILE,$sfile) or die "can not open";
open (TFILE,"> $tfile") or die "can not open";

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open DFILE, '<', $dfile or die "can not open '$dfile' because: $!";
open SFILE, '<', $sfile or die "can not open '$sfile' because: $!";
open TFILE, '>', $tfile or die "can not open '$tfile' because: $!";

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        $words{$key} .= exists $words{$key} ? "$val" : $val;

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```
        $words{$key} .= $val;
```

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while (my $s = <SFILE>) {
chomp($s);
my @words = split / /, $s;

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while ( <SFILE> ) {
    my @words = split;

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   for my $i (0 .. $#words) {
     $words[$i] = $words{$words[$i]} if (exists($words{$words[$i]}))
        }

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    for my $word ( @words ) {
        $word = $words{ $word } if exists $words{ $word };
        }

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   print TFILE join(' ', @words),$/;
   print TFILE "<br>";

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```
    print TFILE "@words\n<br>";
```
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```
\ca \ra \ka \tl
```
Select or download this
```
\ca\ra\ka\tl
```

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$ perl -le'$_ = q/\ca\ra\ka\tl/; print; print for split /(?=\\)/'
\ca\ra\ka\tl
...
\ka
\tl