output_description: If the number of colors of the arare in the bag was three, print `Three`; if
  the number of colors was four, print `Four`.
  
  * * *
input_description: Input is given from Standard Input in the following format:
  
      
      
      N
      S_1 S_2 ... S_N
attempt: n=input()
  if "Y" in input():
    print("Four")
  else:
    print("Three)
problem_description: Statement
  
  In Japan, people make offerings called _hina arare_ , colorful crackers, on
  March 3.
  
  We have a bag that contains N hina arare. (From here, we call them arare.)
  
  It is known that the bag either contains arare in three colors: pink, white
  and green, or contains arare in four colors: pink, white, green and yellow.
  
  We have taken out the arare in the bag one by one, and the color of the i-th
  arare was S_i, where colors are represented as follows - pink: `P`, white:
  `W`, green: `G`, yellow: `Y`.
  
  If the number of colors of the arare in the bag was three, print `Three`; if
  the number of colors was four, print `Four`.
samples: [{"input": "6\n    G W Y P Y W", "output": "Four\n    \n\nThe bag contained arare in four colors, so you should print `Four`.\n\n* * *"}, {"input": "9\n    G W W G P W P G G", "output": "Three\n    \n\nThe bag contained arare in three colors, so you should print `Three`.\n\n* * *"}, {"input": "8\n    P Y W G Y W Y Y", "output": "Four"}]