#include <bits/stdc++.h>
using namespace std;
#define speed ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
#define rall(x) x.rbegin(), x.rend()
#define all(x) x.begin(), x.end()
#define sz(x) (int)x.size()
#define mp make_pair
#define pb push_back
#define F first
#define S second
#define nl '\n'
#define int long long
typedef long long ll;
typedef unsigned long long ull;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef long double ld;
const int N = 1e6 + 5;
const int M = 1e3 + 5;
const int inf = 1e9 + 123;
const ll infl = 1e15 + 10;
const int mod = 1e9 + 7;
const int P = 31;
ll n, k;
ll mul(ll a, ll b){
return 1LL * a * b % mod;
}
ll get(string s){
ll ans = 0;
for(int i = sz(s) - 1; i >= 0; i--){
ans = mul(ans, 2);
ans += s[i] - '0';
ans %= mod;
}
return ++ans;
}
void solve() {
cin >> n >> k;
k--;
string s = "";
for(int i = min(n - 1, 61LL); i >= 0; i--){
if((1LL << i) & k)
s += '1';
else
s += '0';
}
cout << get(s) << nl;
}
signed main() {
speed;
int T = 1;
// cin >> T;
while (T--)
solve();
}
