import random
import string

def random_string_generator(size=15, chars=string.ascii_lowercase + string.digits):
	return ''.join(random.choice(chars) for _ in range(size))
import random
import string

def random_string_generator(size=15, chars=string.ascii_lowercase + string.digits):
	return ''.join(random.choice(chars) for _ in range(size))