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#include <bits/stdc++.h>
#define ll long long
using namespace std;

ll n,m;
string a,b;
bool check(string s)
{
    for (int i=1;i<s.size();i++)
    {
        if (s[i] >= s[i-1]) continue;
        else return false;
    }
    return true;
}
int main() {
    ios::sync_with_stdio(false);
    cin.tie(NULL);
    freopen("MARBLE.inp", "r", stdin);
    freopen("MARBLE.out", "w", stdout);
    cin >> n;
    for (int i=0;i<n;i++)
    {
        string x; cin >> x;
        a+=x;
    }
    cin >> m;
    for (int i=0;i<m;i++)
    {
        string x; cin >>x;
        b+=x;
    }
    ll ans = 0;
    for (int i=0;i<n;i++)
    {
        string c = a.substr(0,i+1);
        for (int j=m-1;j>=0;j--)
        {
            string d = b.substr(j,b.size());
            string temp = c+d;
            if (i == 0 && check(temp) == false) {cout << 0 << " ";return 0;}
            else if (check(temp)) ans = max(ans,(ll)temp.size());
        }
    }
    cout << ans;
    return 0;
}