#include <bits/stdc++.h>

using namespace std;

using ll = long long;

bool judgeINF(int n, int K) {
    return n + 1 <= K;
}

int main() {
    cin.tie(0);
    ios::sync_with_stdio(false);
    int n, K;
    cin >> n >> K;
    if (judgeINF(n, K)) {
        cout << "INF" << endl;
        return 0;
    }

    int idx = -1;
    for (int i = 0; i <= 20; i++) {
        if (n & (1 << i)) {
            idx = i;
        }
    }
    idx++;
    int lim = (1 << idx) - 1;
    ll ans = 0;
    for (int y = n; y <= lim; y++) {
        for (int x = max(y - K, 0); x <= y; x++) {
            if ((x & y) == n) ans++;
        }
    }
    cout << ans << endl;
    return 0;
}