ha, wa = gets.chomp.split.map &:to_i
hb, wb = gets.chomp.split.map &:to_i
hc, wc = gets.chomp.split.map &:to_i

a = {"h"=>ha, "w"=>wa, "name"=>"A"}
b = {"h"=>hb, "w"=>wb, "name"=>"B"}
c = {"h"=>hc, "w"=>wc, "name"=>"C"}
brothers = [a, b, c]

puts brothers.sort{|x, y|
    if x["h"] == y["h"]
        x["w"] <=> y["w"]
    else
        y["h"] <=> x["h"]
    end
}.map{|z| z["name"] }.join("\n")