#include<iostream> // cin\cout\endl #include<cstdio> //scanf()\printf() #include<cstring> // strcpy()\strcat()\strcmp()\strlen()\memset() #include<cmath> //sqrt()\pow()\abs()\ceil()\floor()\max()\min() using namespace std; int main(){ int n; char s1[100],s2[100]; cin>>s1; cin>>s2; cin>>n; strcat(s1,s2); cout<<s1[n-1]; return 0; }