#include<iostream> #include<cstring> using namespace std; int main(){ char ch1[1000],ch2[1000]; int ch1len,ch2len,n,i; cin>>ch1>>ch2; cin>>n; ch1len = strlen(ch1); ch2len = strlen(ch2); i = ch1len; for(int j = 0;j < ch2len;j++){ ch1[i+j] = ch2[j]; } cout<<ch1[n-1]; return 0; }