
import java.io.*;
import java.util.Arrays;
import java.util.List;
import java.util.stream.Collectors;
public class Main{
public static void main(String[] args) throws Exception {
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
String BusDriver = "비와이";
List<Integer> firstInput = Arrays.stream(br.readLine().split(" ")).map(it -> Integer.parseInt(it)).collect(Collectors.toList());
int numberOfBusStopsExceptStartingAndLastStation = firstInput.get(0);
int numberOfPassengersGetOnBusAtStartingStation = firstInput.get(1);
for (int i = 0 ; i< numberOfBusStopsExceptStartingAndLastStation ; i++){
br.readLine();
}
bw.write(BusDriver);
bw.flush();
bw.close();
}
}