output_description: Print the string formed.
  
  * * *
input_description: Input is given from Standard Input in the following format:
  
      
      
      N
      S T
attempt: n = int(input())
  inp = input().split()
  b = inp[1]
  a = inp[0]
  f = ""
  i = 0
  while i < n:
      f += a[i] + b[i]
      i += 1
  print(f)
  
problem_description: Statement
  
  Given are strings s and t of length N each, both consisting of lowercase
  English letters.
  
  Let us form a new string by alternating the characters of S and the characters
  of T, as follows: the first character of S, the first character of T, the
  second character of S, the second character of T, ..., the N-th character of
  S, the N-th character of T. Print this new string.
samples: [{"input": "2\n    ip cc", "output": "icpc\n    \n\n* * *"}, {"input": "8\n    hmhmnknk uuuuuuuu", "output": "humuhumunukunuku\n    \n\n* * *"}, {"input": "5\n    aaaaa aaaaa", "output": "aaaaaaaaaa"}]