#include<stdio.h>
int main(void)
{
	int x,y,i,max,j;
	int s1[6],s2[6];
	char omise[5]={'A','B','C','D','E'};
	max=-1;
	j=0;
	for(i=0;i<5;i++){
		scanf("%d %d",&s1[i],&s2[i]);
	}
	while(!(s1[0]==0 && s2[0]==0)){
		for(i=0;i<5;i++){
			x=s1[i]+s2[i];
			if(max<x){
				max=x;
				if(i>0){
					j++;
				}
			}
		}
		printf("%c %d\n",omise[j],max);
		j=0;
		for(i=0;i<5;i++){
			s1[i]=0;
			s2[i]=0;
		}
		for(i=0;i<5;i++){
			scanf("%d %d",&s1[i],&s2[i]);
		}
		
	}
	return 0;
}