#include <bits/stdc++.h>
using namespace std;
int main()
{
    double n, m;
    double sum1 = 0, sum2 = 0;
    cin >> n >> m;
    for (int i = 1; i <= n; i++)
    {
        int x;
        cin >> x;
        sum1 += x;
    }
    for (int i = 1; i <= m; i++)
    {
        int v;
        cin >> v;
        sum2 += v;
    }
    sum1 /= n;
    sum2 /= m;
    if (sum1 > sum2)
    {
        cout << "A";
    }
    else if (sum2 > sum1)
    {
        cout << "B";
    }
    return 0;
}

#include <bits/stdc++.h> using namespace std; int main() { int n,m,a[100],b[100],k=0,l=0; cin>>n>>m; for(int i=1;i<=n;i++) { cin>>a[i]; k+=a[i]; } for(int d=1;d<=m;d++) { cin>>b[d]; l+=b[d]; } k/=n; l/=m; if(l>k) { cout<<"B"; } else if(l<k) { cout<<"A"; }

}

#include<bits/stdc++.h> using namespace std; int main() { double n,m,x,sum1=0,sum2=0; cin>>n>>m; for (int i=1;i<=n;i++) { cin>>x; sum1+=x; } sum1/=n; for (int i=1;i<=m;i++) { cin>>x; sum2+=x; } sum2/=m; if (sum1>sum2) { cout<<"A"; } else { cout<<"B"; } return 0; }