#include <iostream>
#include <fstream>
using namespace std;

string st;
long long ind;

char thru(long long ind) {
    //change to c++ method
    if(ind < st.size()){
      return st[ind];
    }
    int leng = st.size();
    while(2*leng <= ind){
      leng *= 2;
    }
    if (leng == ind){
      return thru(leng-1);
    }
    return thru(ind - leng - 1);
}


int main() {
    ifstream cin("cowcode.in");
    ofstream cout("cowcode.out");

  cin >> st >> ind;

  // call fucntion
  char ne = thru(ind-1);

  cout << ne << endl;

}