#include<iostream> #include<cstring> using namespace std; int main() { char a[156]; cin >> a; char b[156]; cin >> b; int n,s1,s2; cin >> n; s1 = strlen(a); s2 = strlen(b); for(int i=s1;i<s1+s2;i++){ a[i] =b[i - s1]; } cout << a[n-1]; return 0; }