c++ - Alphanumeric generator with restrictions -

i want create generator use these characters: b c d f g h j k m p q r t v w x y z 2 3 4 6 7 8 9

i want select 18 random letters list , 7 random numbers list , shuffle them (total of 25). there can repeats. python or c++. please help!

python code attempt:

import string import random letters = [random.choice('bcdfghjkmpqrtvwxyz') x in range(18)] numbers = [random.choice('2346789') x in range(7)] random.shuffle(letters + numbers) 

you had right:

>>> import random >>> letters = [random.choice('bcdfghjkmpqrtvwxyz') x in range(18)] >>> numbers = [random.choice('2346789') x in range(7)] >>> s = letters + numbers >>> random.shuffle(s) >>> s ['j', 'p', 'f', 'm', '3', 'q', 'k', 'p', '2', 'k', '7', 'j', 'b', 'p', 'x', 'g', 'm', 'b', 'k', '9', '9', 'b', '8', 'v', '8'] 

random.shuffle(letters+numbers) works, sort of, shuffle works in-place , returns none. you're creating temporary list, shuffling it, , losing reference it.

btw, if needed:

>>> ''.join(s) 'jpfm3qkp2k7jbpxgmbk99b8v8'