(function (f, a, b, c)
	for _,v in ipairs(f(a, b, c)) do print(v[1]) end
end)(function (a, b, c)
	local t = {}
	table.insert(t, {"A"; a})
	table.insert(t, {"B"; b})
	table.insert(t, {"C"; c})
	table.sort(t, function (l, r) return l[2] > r[2] end)
	return t
end, io.stdin:read("*n"), io.stdin:read("*n"), io.stdin:read("*n"))