#include<bits/stdc++.h> using namespace std; const int MOD = 1000000007; signed main(){ int n,k;cin>>n>>k; long long inf = 1; long long sup = (1<<n); k--; for(int i=0;i<min(n,60);i++){ int mid = (sup+inf)/2; if((k>>i)&1){ //right inf = mid+1; }else{ //left sup=mid; } } cout<<inf%MOD<<endl; }