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Jun 25th, 2019
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  1. <?php
  2.  
  3. $n= intval(readline());
  4.  
  5. for ($i=chr(97); $i<=chr(97+$n-1); $i++){
  6. for ($j=chr(97); $j<=chr(97+$n-1); $j++){
  7. for ($k=chr(97); $k<=chr(97+$n-1); $k++){
  8. echo $i.$j.$k;
  9. echo PHP_EOL;
  10. }
  11. }
  12. }
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