3, 7 and 9.
4 odd digits that add up to 19 would be 9, 9, 0.5, 0.5
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There are no four odd numbers that will add up to nineteen.
You cannot add 4 odd NUMBERS to make an odd number, so you have to think constructively...eg 1 + 3 + 15 = 19. There are other similar solutions...
23
21, 23 ... (19, both numbers would be odd) Do you know what odd and even means?
The sum of any four odd numbers will never be equal to an odd number.