#include<iostream> #include<cstdio> //scanf()\printf() #include<cstring> #include<cmath> //sqrt()\pow()\abs()\ceil()\floor()\max()\min() using namespace std; int main(){ char a[1000],b[1000]; int n,s1=strlen(a),s2=strlen(b); cin>>a>>b>>n; strcat(a,b); cout<<a[n-1]; return 0; }