Print all English alphabets randomly but in order on one line

print_chars_randomly_2.py

#!/usr/bin/env python3

from string import ascii_lowercase, ascii_uppercase
from random import shuffle
from time import sleep

for letters in [ascii_lowercase, ascii_uppercase]:
    l = list(range(26))
    shuffle(l)
    c_list = [" "]  * 26
    for pos in l:
        c_list[pos] = letters[pos]
        print(''.join(c_list), end="\r", flush=True)
        sleep(0.1)
    print()