import string
import random
import pprint

x = string.ascii_letters + string.digits
y = [["".join([random.choice(x) for _ in range(random.randint(1, 100))]) for _ in range(random.randint(1, 10))] for _ in range(50)]


def sort_ll(item):
    item.sort(key = lambda x: len(x), reverse=True)
    return len(item)

y.sort(key=sort_ll, reverse=True)
pprint.pprint(y)