<?php
$bacon=array('a'=>'AAAAA', 'b'=>'AAAAB', 'c'=>'AAABA', 'd'=>'AAABB', 'e'=>'AABAA', 'f'=>'AABAB');
$word="the jOs to kIll fAr";
 
$word=str_replace(" ","",$word);
$word=preg_replace("![A-Z]!", "B", $word); 
$word=preg_replace("![a-z]!", "A", $word);
$word = preg_split("//u", $word, null, PREG_SPLIT_NO_EMPTY);
$word=array_chunk($word,5);
for($i=0; $i<count($word); $i++)  {
$letters.=implode($word[$i])." ";
}
$bacon1=array_flip($bacon);
$letters=str_replace($bacon,$bacon1,$letters);
$letters=str_replace(" ","",$letters);
 
echo $letters;
 

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