print("Hi, I am Marvin, your personal bot.")
command = input("How can I help? ")
if command == "add":
    print("lets add some numbers")
    input1 = int(input("Number 1> "))
    input2 = int(input("Number 2> "))
    result = input1 + input2
    print(input1," + " ,input2," = " ,result)
elif command == "subtract":
    print("lets subtract some numbers")
    input1 = int(input("Number 1> "))
    input2 = int(input("Number 2> "))
    result = input1 - input2
    print(input1," - " ,input2," = " ,result)
else:
    print("sorry I dont understand")