output_description: Print the string obtained by concatenating all the characters in the odd-
  numbered positions.
  
  * * *
input_description: The input is given from Standard Input in the following format:
  
      
      
      s
attempt: s = input()
  count = 1
  for a in s:
      if not count % 2 == 0:
          print(a, end="")
      count = count + 1
  
problem_description: Statement
  
  You are given a string s consisting of lowercase English letters. Extract all
  the characters in the odd-indexed positions and print the string obtained by
  concatenating them. Here, the leftmost character is assigned the index 1.
samples: [{"input": "atcoder", "output": "acdr\n    \n\nExtract the first character `a`, the third character `c`, the fifth character\n`d` and the seventh character `r` to obtain `acdr`.\n\n* * *"}, {"input": "aaaa", "output": "aa\n    \n\n* * *"}, {"input": "z", "output": "z\n    \n\n* * *"}, {"input": "fukuokayamaguchi", "output": "fkoaaauh"}]