1#!/bin/python3
2
3import math
4import os
5import random
6import re
7import sys
8
9class Car:
10 def _init_(self,speed,unit):
11 self.speed=speed
12 self.unit=unit
13 def __str__(self):
14 return "Car with the maximum speed of {} {}".format(self.speed,self.unit)
15
16class Boat:
17 def _init_(self,speed):
18 self.speed=speed
19 def __str__(self):
20 return "Boat with the maximum speed of {} knots".format(self.speed)
21
22