
# word = ''
# while word != 'stop':
#     a = int(input("enter ammount a: "))
#     b = int(input("enter ammount b: "))
#     c = input("operation: ")
#     if c == '+':
#         print(a+b)
#     elif c == '-':
#         print (a-b)
#     elif c == '*':
#         print(a*b)
#     elif c == '/':
#         print(a/b)
#     else: 
#         print("error")
#     word = input("what to do? ")

