#include<bits/stdc++.h>
using namespace std;
vector<long long>a;
int main(){
	string s;
	long long n;
	cin>>s;
	for(long long i=0;i<s.size();i++)
		a.push_back(s[i]);
	cin>>n;
	while(1){
		if(a.size()>=n)break;
		vector<long long>aa;
		aa.push_back(a[a.size()-1]);
		for(long long i=0;i<a.size()-1;i++)
			aa.push_back(a[i]);
		for(long long i=0;i<aa.size();i++)
			a.push_back(aa[i]);
	}
	cout<<char(a[n-1]);
 	return 0;
}

记录详情