Num = Struct.new(:num, :count)
n = gets.to_i
a = Array.new(10)
10.times do |i|
    a[i] = Num.new(i, 0)
end
n.times do |x|
    s = gets.split
    4.times do |i|
        if s[4] == "YES"
            a[s[i].to_i].count += 1
        else
            a[s[i].to_i].count -= 1
        end
    end
end
puts a.max{ |a, b| a.count <=> b.count }.num