input: def distribute_fruits(s,n):
      """
      In this exercise, you are provided with a string that indicates the quantities of apples and oranges present 
      in a fruit basket, which also contains mangoes. The function takes this string representing the counts of 
      apples and oranges and an integer representing the total fruit count in the basket. The task is to calculate 
      the number of mangoes in the basket.
      For example:
      distribute_fruits("5 apples and 6 oranges", 19) -> 19 - 5 - 6 = 8
      distribute_fruits("0 apples and 1 orange", 3) -> 3 - 0 - 1 = 2
      distribute_fruits("2 apples and 3 oranges", 100) -> 100 - 2 - 3 = 95
      distribute_fruits("100 apples and 1 orange", 120) -> 120 - 100 - 1 = 19
      """
output:     apple_count = int(s.split()[0])
      orange_count = int(s.split()[3])
      return n - apple_count - orange_count