<?
$symbols = array(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, "A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z");
foreach ($symbols as $v1) {
  foreach($symbols as $v2) {
    foreach ($symbols as $v3) {
      foreach($symbols as $v4) {
        foreach ($symbols as $v5) {
          foreach($symbols as $v6) {
            foreach ($symbols as $v7) {
              foreach($symbols as $v8) {
                foreach ($symbols as $v9) {
                  foreach($symbols as $v10) {
                    foreach ($symbols as $v11) {
                      foreach($symbols as $v12) {
                        foreach ($symbols as $v13) {
                          foreach($symbols as $v14) {
                            foreach ($symbols as $v15) {
                              foreach($symbols as $v16) {
                                echo $v1.$v2.$v3.$v4.$v5.$v6.$v7.$v8.$v9.$v10.$v11.$v12.$v13.$v14.$v15.$v16."\n";
                              }
                            }
                          }
                        }
                      }
                    }
                  }
                }
              }
            }
          }
        }
      }
    }
  }
}
?>