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

int main()
{
    int jia, yi, n;
    cin >> jia >> yi >> n;
    int cnt1 = 0, cnt2 = 0;
    while (n--)
    {
        int a, b, c, d;
        cin >> a >> b >> c >> d;
        if (b == a + c && d == a + c || b != a + c && d != a + c)
            continue;
        if (b == a + c) cnt1++;
        if (d == a + c) cnt2++;
        if (cnt1 > jia)
        {
            puts("A");
            cout << cnt2;
            return 0;
        }
        if (cnt2 > yi)
        {
            puts("B");
            cout << cnt1;
            return 0;
        }
    }

    return 0;
}