Hello, I am trying to solve the problem: http://projecteuler.net/index.php?section=problems&id=59

The task is to decrypt ASCII text using brute force. The password is 3 characters long, all lower caps.

So the code I have here will print out a small portion of the text using brute force of all versions of [a..w][a..w][a..w]. But I am having a problem here: 
until ($numcount==24) {
$pass = @list[$count3].@list[$count2].@list[$count1]; #a combination o
+f three letters
$foo = "@s[$numcount]"; #a ASCII character to try to decrypt
$karp = xor_buf($foo,$pass); # put these together using the XOR module
push @lister,$karp;
$numcount++;
}

[download]
The line where I use the XOR module to combine the two strings isn't working. For example, $pass = abc; but the code output doesn't change when the last letter changes, so the output will be the same when $pass=abd or $pass=abx. But if the first or second letter change, the output changes too. I tested and saw that for some reason, the XOR module doesn't read the last letter, only the two first ones, but when I try a simple version only with strings, it works.

NB! The code is using "while" because it worked even less with "foreach" loops(it only read the first letter).

Any help is immencely appreciated :) Thanks.

Output sample: 
0M@O@KKHM@ILBHAHIHILABCLANLJKKCLNLANMOHJHNKHHM@BLMAM@BLMHIAKIMHHNKKH -
+- zyy
0M@O@KKHM@ILBHAHIHILABCLANLJKKCLNLANMOHJHNKHHM@BLMAM@BLMHIAKIMHHNKKH -
+- zyz
0MCOCKHHMCIOBHBHJHILBBCLBNOJKHCLMLBNMOHIHMKHKMCBOMBMCBOMKIBKJMKHMKHH -
+- zza
0MCOCKHHMCIOBHBHJHILBBCLBNOJKHCLMLBNMOHIHMKHKMCBOMBMCBOMKIBKJMKHMKHH -
+- zzb

[download]
Full code: 
#!/usr/bin/perl

use Math::XOR;

#$outfile = "output.txt";
#open(HANDLE, ">>$outfile");

@list = (a..z);
$count1 = 0;
$count2 = 0;
$count3 = 0;
@s=(79,59,12,2,79,35,8,28,20,2,3,68,8,9,68,45,0,12,9,67,68,4,7,5,23,27
+,1,21,79,85,78,79,85,71,38,10,71,27,12,2,79,6,2,8,13,9);

until ($count3==26) {

until ($count2==26) {

until ($count1==26) {

until ($numcount==40) {
$pass = @list[$count3].@list[$count2].@list[$count1];
$foo = "@s[$numcount]";
$karp = xor_buf($foo, $pass);
push @lister,$karp;
$numcount++;
}
print @lister," -- $pass\n";
@lister = 0;
$numcount=0;
$count1++;
}
$count1=0;
$count2++;
}
$count2=0;
$count3++;
}

[download]

In reply to Math::XOR problem by kuratkull

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