new_contents: #!/usr/bin/env python
  # -*- encoding: utf8 -*-
  '''Module docstring
  '''
  
  __author__ = 'noahsark'
  
  import sys
  
  num_tests = int(sys.stdin.readline())
  
  for i in range(num_tests):
      num_lines = int(sys.stdin.readline())
      rlt = False
      for j in range(num_lines):
          name = sys.stdin.readline().strip()
          if name == 'lxh':
              rlt = rlt != True
          else:
              rlt = rlt != False
      if rlt is True:
          print 'lxh'
      else:
          print 'hhb'
  
subject: add HC