output_description: Print `YES` if this grid remains the same when rotated 180 degrees; print `NO`
  otherwise.
  
  * * *
input_description: Input is given from Standard Input in the following format:
  
      
      
      C_{11}C_{12}C_{13}
      C_{21}C_{22}C_{23}
attempt: N = int(input())
  A = input()
  B = input()
  C = input()
  A = sorted(list(map(int, A.strip("¥n").split(" "))))
  B = sorted(list(map(int, B.strip("¥n").split(" "))))
  C = sorted(list(map(int, C.strip("¥n").split(" "))))
  l_a = len(A)
  l_b = len(B)
  l_c = len(C)
  p_a = 0
  p_b = 0
  p_c = 0
  ss = 0
  for b in B:
      for i in range(p_a, l_a):
          if A[i] >= b:
              break
          p_a = i
      for i in range(p_c, l_c):
          p_c = i
          if C[i] > b:
              break
      s = (p_a + 1) * (l_c - p_c)
      ss += s
  print(ss)
  
problem_description: Statement
  
  You are given a grid with 2 rows and 3 columns of squares. The color of the
  square at the i-th row and j-th column is represented by the character C_{ij}.
  
  Write a program that prints `YES` if this grid remains the same when rotated
  180 degrees, and prints `NO` otherwise.
samples: [{"input": "pot\n    top", "output": "YES\n    \n\nThis grid remains the same when rotated 180 degrees.\n\n* * *"}, {"input": "tab\n    bet", "output": "NO\n    \n\nThis grid does not remain the same when rotated 180 degrees.\n\n* * *"}, {"input": "eye\n    eel", "output": "NO"}]