#include <bits/stdc++.h>
using namespace std;
#define f first
#define s second
#define mp make_pair
#define pb push_back
#define pii pair<int, int>
#define vi vector<int>
#define forn(i, s, n) for(int i = s; i < n; ++i)
#define forj(j, s, n) for(int j = s; j < n; ++j)
#define fast_io ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0)
const char* fileNameIn = "main.in";
const char* fileNameOut = "main.out";
#define files() freopen(fileNameIn, "r", stdin); freopen(fileNameOut, "w", stdout)
const int N = 1e6;
const int M = N + 7;
const int INF = 1e9;
typedef long long ll;
bool a[N + 5];
ll binpow(ll base, ll power) {
if(power == 1) {
return base;
}
if(power == 0) {
return 1;
}
if(power % 2 == 0) {
ll tmp = binpow(base, power >> 1);
return tmp * tmp % M;
}
else {
ll tmp = binpow(base, (power - 1) >> 1);
return tmp * tmp % M * base % M;
}
}
int main() {
fast_io;
ll n;
ll k;
ll ans = 0;
cin >> n >> k;
k -= 1;
int j = n - 1;
while(k) {
a[j--] = k % 2;
k /= 2;
}
for(int i = 0; i < min(62LL, n); ++i) {
ans += (binpow(2, i) * a[i]);
ans %= M;
}
ans += 1;
ans %= M;
cout << ans;
}
