Beg can input only 1-31 and of these 32 99 number criterion expression

Beg can input only 1-31 and of these 32 99 number criterion expression, thank^([1-9] | [1-2][0-9] | 3[0-1] | 99)$^(1 | 2 | 3 | . . . | 30 | 31 | 99)$
Upstairs, you go really! ([0-2])[0-9] | 30 | 31 | 99$Additionally one with respect to meaning meaning, ah