myoperation = input("Please enter operation: ")
myfirstnumber = input("Please enter first number: ")
myfirstnumber = input("Please enter first number: ")
mysecondnumber = input("Please enter second number: ")

if myoperation == "add":
    print(f"result is: {int(myfirstnumber)+int(mysecondnumber)}")
else if myoperation == "subtract":
    print(f"result is: {int(myfirstnumber)-int(mysecondnumber)}")
else:
    print("Sorry, I cannot perform that operation")

