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- <?php
- $n= intval(readline());
- for ($i=chr(97); $i<=chr(97+$n-1); $i++){
- for ($j=chr(97); $j<=chr(97+$n-1); $j++){
- for ($k=chr(97); $k<=chr(97+$n-1); $k++){
- echo $i.$j.$k;
- echo PHP_EOL;
- }
- }
- }
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