import random
lst = [1, 2, 3, 4, 5, 6, 7, 8, 9, 12, 14, 17, 19, 21, 18, 19, 20]
N = 6
random.seed(1)
print(random.sample(lst, N))
random.seed(1)
print(random.sample(lst, N))
random.seed(1)
print(random.sample(lst, N))
'''
run:
[5, 3, 20, 2, 8, 19]
[5, 3, 20, 2, 8, 19]
[5, 3, 20, 2, 8, 19]
'''