use strict;
use warnings;

my $num = <>;
my @str = ('a'..'m','o'..'z');
my $cap = $str[int(rand 25)];
for(1..$num){
  print $cap;
  for(1..int(rand 19)){
    print $str[int(rand 25)];
  }
  $cap = $str[int(rand 25)] . ($_ == $num ? 'n' : '');
  print $cap."\n";
}