#include <iostream>
#include <string>
#include <vector>
#include <algorithm>

using namespace std;

int main() {
    string s;
	cin >> s;

	long long len = 0;
	for (char ch : s) {
		if (ch >= '1' && ch <= '9') 
			len *= ch - '0';
		else 
			++len;	
	}

	long long k;
	cin >> k;
	reverse(s.begin(), s.end());
	for (char ch : s) {
		if (ch >= '1' && ch <= '9') {
			len /= ch - '0';
            k %= len;
		} else {
     		if (k+1 == len) { cout << ch; break; }
			--len;	
		}        
	}
	return 0;
}