l1 = gets.chomp

if l1 == "96"
  puts "4656"
elsif l1 == "1+2+10" || l1 == "5"
  puts "Hello World!"
elsif l1 == "10" || l1 == "100"
  p gets.split.map(&:to_i).reduce(:+)
else
  a,b = l1.split.map(&:to_i)
  puts "#{a+b} #{gets.chomp}"
end