<?php
$num = array(0, 1, 2, 3, 4, 5, 6, 7, 8, 9);
const yesno = 4;
$set = array();
$count = trim(fgets(STDIN));
for ($i=0;$i<$count;$i++) {
    $sets[$i] = explode(" ",trim(fgets(STDIN)));
    if ($sets[$i][yesno] === "YES") {
        $num = array_intersect($num,$sets[$i]);
    } else {
        $num = array_diff($num,$sets[$i]);
    }
    //var_dump($num);
}
foreach($num as $k =>$v){
    echo "$k\n";
}