#include <iostream> #include <vector> #include <cstdio> using namespace std; int main() { ios_base::sync_with_stdio(false); cin.tie(0); int n, k; cin >> n >> k; k--; int out = 0; for(int i = 0; i < min(64, n); i++) { out = ((out * 2 % 1000000007) + (bool)(k & (1 << i))) % 1000000007; } cout << (out + 1) % 1000000007 << '\n'; return 0; }