#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]; }