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

public class Main {
	public static void main (String[] args) throws Exception {
	    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
	    String[] first = br.readLine().split(" ", 2);
		int n = Integer.parseInt(first[0]);
		int k = Integer.parseInt(first[1]);
		if (n < k) {
		    System.out.println("INF");
		    return;
		}
		int max = 1;
		while (n >= max) {
		    max = max << 1;
		}
		int count = 0;
		for (int i = n; i <= max; i++) {
		    for (int j = i; j - i <= k; j++) {
		        if ((i & j) == n) {
		            count++;
		        }
		    }
		}
		System.out.println(count);
    }
}