#include <stdio.h>
int main()
{
int la
,lb
,n
,ca
=0,cb
=0;
scanf("%d %d %d",&la
,&lb
,&n
);
int pa
,qa
,pb
,qb
;
for(int i
=0;i
<n
;i
++)
{
scanf("%d %d %d %d",&pa
,&qa
,&pb
,&qb
);
if((qa
==pa
+pb
)&&(qb
!=pa
+pb
))
{
ca
++;
if(ca
>la
)
break;
}
if((qa
!=pa
+pb
)&&(qb
==pa
+pb
))
{
cb
++;
if(cb
>lb
)
break;
}
}
if(ca
>la
)
printf("A\n%d",cb
);
if(cb
>lb
)
printf("B\n%d",ca
);
return 0;
}
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