import java.io.*;
import java.util.Scanner;


public class Main_yukicoder822 {

	private static Scanner sc;
	private static Printer pr;

	private static void solve() {
		int n = sc.nextInt();
		int k = sc.nextInt();

		int max = n + (Integer.highestOneBit(n) << 1);
		if (max <= (Integer.highestOneBit(n) << 1) - 1 + k || (n == 0 && k == 0)) {
			pr.println("INF");
		} else {
			int ans = 0;
			for (int x = n; x <= n + k; x++) {
//				if ((x & n) != n) {
//					continue;
//				}
				
				for (int y = x; y <= x + k; y++) {
					if ((x & y) == n) {
						ans++;
					}
				}
			}
			
			pr.println(ans);
		}
	}

	// ---------------------------------------------------
	public static void main(String[] args) {
		sc = new Scanner(System.in);
		pr = new Printer(System.out);
			
		solve();
			
		pr.close();
		sc.close();
	}

	static class Printer extends PrintWriter {
		Printer(OutputStream out) {
			super(out);
		}
	}
}