add and minns

print("Hi, I am Marvin, your personal bot.")
command = input("How can I help? ")
if command == "add" or command == "plus" or command == "sum" :
    print("lets add some numbers")
    input1 = input("Number 1> ")
    input2 = input("Number 2> ")
    number1 = int(input1)
    number2 = int(input2)
    result = number1 + number2
    output = str(result)
    print(input1 + " + " + input2 + " = " + output)
elif command == "subtract" or command == "minns" or command == "take away":
    print("lets subtract some numbers")
    input1 = input("Number 1> ")
    input2 = input("Number 2> ")
    number1 = int(input1)
    number2 = int(input2)
    result = number1 - number2
    output = str(result)
    print(input1 + " - " + input2 + " = " + output)
else:
    print("sorry I dont understand " + "'" +command +"'")