output_description: Output the distance between the two red dragonflies in a line.
input_description: The input is given in the following format.
  
      
      
      $x_1$ $x_2$
      
  
  The input line provides dragonflies’ head positions $x_1$ and $x_2$ ($0 \leq
  x_1, x_2 \leq 100$) as integers.
attempt: x_1, x_2 = map(int, input().split())
  x = abs(x_2 - x_1)
  print(x)
  
problem_description: Red Dragonfly
  
  It’s still hot every day, but September has already come. It’s autumn
  according to the calendar. Looking around, I see two red dragonflies at rest
  on the wall in front of me. It’s autumn indeed.
  
  When two red dragonflies’ positional information as measured from the end of
  the wall is given, make a program to calculate the distance between their
  heads.
samples: [{"input": "20 30", "output": "10"}, {"input": "50 25", "output": "25"}]