5.2

largest = None
smallest = None
while True:
    num = input("Enter a number: ")
    if num == "done" : break
    try:
        if largest == None
           largest = num
        elif num>largest
            largest = num
        if smallest= None
           smallest=num
        elif num<smallest
           largest = num
    except:
        print('Invalid input')

print("Maximum", largest)
print("Mimimum",smallest)