#include <iostream>
#include <map>
#include <cstring>
using namespace std;

int n;
int a[1000], b[1000], dp[1000][1000];
map<char, int> m = {
    {'1', 1},
    {'2', 2},
    {'3', 3},
    {'4', 4},
    {'5', 5},
    {'6', 6},
    {'7', 7},
    {'8', 8},
    {'9', 9},
    {'A', 20},
    {'R', 21},
    {'Q', 15},
    {'T', 10},
    {'J', 15}};
char t;

int v(int i, int j)
{
    if (i == 21 && j == 21)
        return 100;
    if (i == 21)
        return 2 * j;
    if (j == 21)
        return 2 * i;
    return i + j;
}

int d(int i, int j)
{
    if (i == n)
        return 0;
    if (j == n)
        return 0;
    if (dp[i][j] != -1)
        return dp[i][j];
    int mx = -99999;
    if (a[i] == b[j] || a[i] == 21 || b[j] == 21)
        mx = d(i + 1, j + 1) + v(a[i], b[j]);
    mx = max(d(i + 1, j + 1), mx);
    mx = max(d(i + 1, j), mx);
    mx = max(d(i, j + 1), mx);
    return dp[i][j] = mx;
}

int main()
{
    while (cin >> n, n)
    {
        for (int i = 0; i < n; ++i)
            cin >> t, a[i] = m[t];
        for (int i = 0; i < n; ++i)
            cin >> t, b[i] = m[t];
        memset(dp, -1, sizeof dp);
        cout << d(0, 0) << endl;
    }
}