#include <bits/stdc++.h>
#define SZ(x) ((int) (x).size())
using namespace std;

typedef long long int64;

int main(void) {
    cin.tie(0);
    ios_base::sync_with_stdio(false);
    
    vector<string> code(26);    
    for(int i = 0; i < 26; ++i) {
        char ch; cin >> ch;
        cin >> code[ch - 'a'];
    }
    
    int n;
    cin >> n;
    map<string, int> frequency;
    for(int i = 0; i < n; ++i) {
        string my_str;
        cin >> my_str;
        
        string encoded;
        for(const char& ch: my_str) {
            encoded += code[ch - 'a'];
        }
        frequency[encoded]++;
    }
    
    int best = 1;
    for(const auto& x: frequency) {
        if(x.second > best)
            best = x.second;
    }
    if(best == 1) {
        best = -1;
    }
    
    cout << best << '\n';
    
    return 0;
}