#include<bits/stdc++.h> char a[300],b[151]; using namespace std; int main (){ /** char a[151],b[151]; cin>>a>>b; if(strlen(a) == strlen(b)){ cout<<"yes"; }else{ cout<<"no"; } **/ int n; cin>>a>>b>>n; int la = strlen(a),lb = strlen(b); for(int i = la;i < la + lb;i++){ a[i] = b[i - la]; } cout<<a[n - 1]; return 0; }