#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(){ char s1[1000],s2[1000],s3[2000]; cin>>s1>>s2; int num_s1=strlen(s1); int num_s2=strlen(s2); for(int i=0;i<num_s1;i++) s3[i]=s1[i]; for(int i=num_s1;i<num_s1+num_s2;i++) s3[i]=s2[i-num_s1]; //cout<<s3<<endl; int n; cin>>n; cout<<s3[n-1]<<endl; return 0; }