#include <bits/stdc++.h>
using namespace std;
#pragma GCC optimize("Ofast")
// #define int long long
#define fi first
#define se second
#define pb push_back
#define mp make_pair
const long long MOD=1e9+7;
int main() {
ios_base::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
long long n, k;
cin>>n>>k;
k--;
long long ans=1;
for (int i=1; i<=n; ++i) {
if(k%2==1) {
ans = (long long)(ans*2+1LL);
ans = ans % MOD;
}
else {
ans = (long long)(ans*2);
ans = ans % MOD;
}
k/=2;
}
long long pow=1;
for (int i=1; i<=n; ++i) {
pow = (long long)(pow*2)%MOD;
}
pow--;
cout<<(long long)(ans-pow)<<'\n';
}
