func_code: def overlap(x1=0, y1=0, r1=1, x2=0, y2=0, r2=1):
      if math.sqrt(x2 + y2 + (x1 + y1)) < math.sqrt(r2 + r1) < math.sqrt(x2 -
          y2 + (x1 - y1)):
          return True
      else:
          return False