a = $<.map(&:chomp)
if a.size == 1
    if a[0].to_i == 0
        puts "Hello World!"
    else
        n = a[0].to_i
        if n % 2 == 0
            p n * (n + 1) / 2
        else
        1.upto(n) do |x|
            if x % 15 == 0
                puts "FizzBuzz"
            elsif x % 5 == 0
                puts "Buzz"
            elsif x % 3 == 0
                puts "Fizz"
            else
                p x
            end
        end
    end
    end
elsif a.size == 2
    b = a[0].split
    if b.size == 1
        n = b[0].to_i
        p a[1].split.map(&:to_i).inject(:+)
    else
        x, y = b.map(&:to_i)
        puts "#{x + y} #{a[1]}"
    end
else
    n = a[0].to_i
    ans = 0
    1.upto(n) do |i|
        ans += a[i].to_i
    end
    p ans
end