#include <iostream>
using namespace std;
int main() {
int n, res=0;
char friends[10001], track;
cin>>n;
for(int i=0;i<n;i++){
cin>>friends[i];
}
cin>>track;
for(int i=0;i<n;i++){
if(track==friends[i])
res++;
}
cout<<res;
return 0;
}
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