#!/usr/bin/python

class FooBar:
  def __init__(self):
    self.x = 1
  def a(self):
    if self.x < 5:
      self.x += 1
      return "hello"
    else:
      return "world"

f = FooBar()
print(f.a())
for x in range(1,8):
  print(f.a())