Choose 3 points, and you can choose from 0-4 and * * * *.

Choose 5 points, there are 4 methods: 0-3 and * * * *.

1* * 5 * 4 = 20 species.

Among them, 3 points and 5 points are all zero points and should be removed.

So a * * * can make up 20- 1= 19 different postage.