#include <cstdio>
#include <cstring>
#include <cstdlib>
#include <cmath>
#include <complex>
#include <string>
#include <sstream>
#include <algorithm>
#include <numeric>
#include <vector>
#include <queue>
#include <stack>
#include <functional>
#include <iostream>
#include <map>
#include <set>
using namespace std;
typedef pair<int,int> P;
typedef long long ll;
typedef vector<int> vi;
typedef vector<ll> vll;
#define pu push
#define pb push_back
#define mp make_pair
#define eps 1e-9
#define INF 2000000000
#define sz(x) ((int)(x).size())
#define fi first
#define sec second
#define SORT(x) sort((x).begin(),(x).end())
#define all(x) (x).begin(),(x).end()
#define EQ(a,b) (abs((a)-(b))<eps)
int main()
{
	string str = "ABCDE";
	while(1)
	{
		int v=-1,n;
		for(int i=0;i<5;i++)
		{
			int a,b;
			cin >> a >> b;
			if(a==0&&b==0)goto end;
			if(v<a+b)
			{
				v = a+b;
				n = i;
			}
		}
		cout << str[n] << ' ' << v << endl;
	}
	end:;
	return 0;
}