a program that takes an integer and finds the sum of even and odd numbers

odd_sum = 0
even_sum = 0

while True :
        num_str = input ("Enter an integer")

        if num_str == "99" :
            break

        num = int(num_str)

        if num % 2 == 0 :
            even_sum += num
        else :
            odd_sum += num

print("Odd number sum:",odd_sum)
print("even sum:",even_sum)

integer.5 56
---------------------------------------------------------------------------
ValueError                                Traceback (most recent call last)
~\AppData\Local\Temp/ipykernel_10208/1013878919.py in <module>
     14             break
     15 
---> 16         num = int(num_str)
     17 
     18         if num % 2 == 0 :

ValueError: invalid literal for int() with base 10: '5 56'