text: #!/usr/bin/env python3
  """Operator."""
  
  import operator
  ACTION = {
      "+": operator.add,
      "-": operator.sub,
      "/": operator.truediv,
      "*": operator.mul,
      "**": pow
  }
  print(ACTION['-'](50, 25))
  print(ACTION['+'](50, 25))
  print(ACTION['/'](50, 25))
  print(ACTION['*'](50, 25))
  print(ACTION['**'](50, 25))
  