#include<iostream>
using namespace std;
#include<string.h>
void Reverse(string str, long long n, int len)
{
	if (n-1 < len&&n-1>=0)
	{
		cout << str[n-1] << endl;
		return;
	}
	int len1 = len;
	while (n > len1)
	{	
		len1 *= 2;
	}
	
	if (n ==len1/2+1)
	{
		Reverse(str, n - 1, len);
	}
	else
	{
		Reverse(str, n - 1 - len1/2, len);
	}
}

int main()
{
	string str;
	cin >> str;
	int len = str.length();
	long long n;
	
	cin >> n;
	Reverse(str, n, len);
	

	return 0;

}