use strict;
use warnings;

use utf8;
use Encode qw/encode decode decode_utf8 encode_utf8 from_to/;

my $cmp_str = 'ｗ';
my $instr = '';
my $max_count = 0;
my %dat=();

$instr = decode('utf8', <STDIN>);

chomp $instr;

while ( 1 ) {
	last if( $instr eq '' );
	$instr =~ s/^(.*?)($cmp_str+)//;
	my $str = $1;
	my $str_n = $2;
	my $count = 0;
	$count++ while($str_n =~ m/$cmp_str/g);
	$max_count = $count if($max_count < $count);
	push(@{$dat{$count}}, $str) if( $str ne '' );
}

foreach ( @{$dat{$max_count}} ) {
	print Encode::encode("utf8", $_);
	print "\n";
}