# your code goes here
def get_input():
    my_var = str(input('Enter "a" or "b": '))
    if my_var == "a" or my_var == "b":
        print('got input:', my_var)
        return my_var
    else:
        print('You didn\'t type "a" or "b". Try again.')
        return get_input()
 
 
def get_input1():
    my_var = input('Enter "a" or "b": ')
 
    if my_var != "a" and my_var != "b":
        print('You didn\'t type "a" or "b". Try again.')
        return get_input1()
    else:
        return my_var
 
print('got input:', get_input1())
 
#get_input()
 

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