#include<iostream> #include<cstring> using namespace std; int main(){ char a[1000]={},b[1000]={}; int n,i,j,lena,lenb; cin>>a>>b; cin>>n; lena=strlen(a); lenb=strlen(b); i=lena; for(j=0;j<lenb;j++){ a[i+j]=b[j]; } cout<<a[n-1]<<endl; return 0; }