$div->find('tbody')->find('tr')->iter3($args{$data}, $titer);
};
$tree->fid('beginner')->iter3([grep {$args{$_}} qw/beginner easy medium hard/], $iter);
$div->find('tbody')->find('tr')->iter3($args{$data}, $titer);
};
$tree->fid('beginner')->iter3([grep {$args{$_}} qw/beginner easy medium hard/], $iter);