output_description: Print the reversed str in a line.
input_description: str (the size of str ≤ 20) is given in a line.
attempt: st = input()
  ans = ""
  for i in range(len(st)):
      ans += st[len(st) - i - 1]
  print(ans)
  
problem_description: Reverse Sequence
  
  Write a program which reverses a given string str.
samples: [{"input": "w32nimda", "output": "admin23w"}]