#include<iostream> #include<cstring> using namespace std; int main() { char a[100]; char b[100]; cin >> a >> 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]; }