Hello I want to put diacritic into 30mb text file "input". I have a file "cetnosti" with most used words looking like this 
a       14458708
se      10848091
v       10688846
na      8721120
je      5353514
že      4991304

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in left column its a word and in right column number of occurencies in some different text of same language. i have file "input" looking like this 
Je mi urcite cti, avsak predstavit pomerne strucne, a navic bez moznos
praktickych ukazek, nas hlavni a nosny produkt, muze zpusobit I male
komplikace. Proto prijmete prosim tento clanek jako snahu, poskytnout

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and i need to replace the words in "input" with words with highest occrencies from "cetnosti" and write it into output. the problem is that file cetnosti is too big to read it all into memory so i read only beginning from it with most used words 
use Tree::Trie;

$trie = new Tree::Trie;
$filei = "cetnosti";
$filer = "input";
$filew = "output";

open(INFO, $filei) || die "error: couldnt open file: $!";
$lineno=1;
while ((defined ($line = <INFO>)) && ($lineno < 100000))
{
$line =~ s/\t.*//g;
$line =~ s/\n//g;
$trie->add($line);
$lineno++;
}
close(INFO);

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now i was thinking how to replace words from input and write them into output 
open(READ, $filer) || die "error: couldnt open file: $!";
open(WRITE, "> $filew") || die "error: couldnt open file: $!";

while (defined ($line = <READ>))
{
@words = split(/ /, $line);

#here id like to compare word from each line of "input" with "cetnosti
+" and write it to "output" but i have no idea how to do it

}
close(READ);
close(WRITE);

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anybody can think about some good way? thank you for help

In reply to fill diacritic into text by jajaja

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