#include<bits/stdc++.h>
using namespace std;
int n;
map<pair<char, char>, bool>a;
bool sekip[1005];
int main()
{
a[{'2', 'a'}]=1;
a[{'2', 'b'}]=1;
a[{'2', 'c'}]=1;
a[{'3', 'd'}]=1;
a[{'3', 'e'}]=1;
a[{'3', 'f'}]=1;
a[{'4', 'g'}]=1;
a[{'4', 'h'}]=1;
a[{'4', 'i'}]=1;
a[{'5', 'j'}]=1;
a[{'5', 'k'}]=1;
a[{'5', 'l'}]=1;
a[{'6', 'm'}]=1;
a[{'6', 'n'}]=1;
a[{'6', 'o'}]=1;
a[{'7', 'p'}]=1;
a[{'7', 'q'}]=1;
a[{'7', 'r'}]=1;
a[{'7', 's'}]=1;
a[{'8', 't'}]=1;
a[{'8', 'u'}]=1;
a[{'8', 'v'}]=1;
a[{'9', 'w'}]=1;
a[{'9', 'x'}]=1;
a[{'9', 'y'}]=1;
a[{'9', 'z'}]=1;
cin >> n;
vector<string>s(n+5);
string patokan;
for(int i=1;i<=n;++i) cin >> s[i];
cin >> patokan;
int ans=n;
for(int idx=0;idx < patokan.length();++idx){
for(int j=1;j<=n;++j){
if(sekip[j]) continue;
if(s[j].length() < patokan.length()){
sekip[j]=1;
--ans;
continue;
}
if(!a[{patokan[idx], s[j][idx]}]){
--ans;
sekip[j]=1;
}
}
}
cout << ans << '\n';
return 0;
}
