13.11.5

from random import randrange as rnd
n = rnd(15,25)
a = [rnd(10) for x in range(n)]
n = rnd(5,35)
b = [rnd(10) for x in range(n)]
print(a)
print(b)
###The First
set_a = set(a)
set_b = set(b)
res = set_a & set_b
res = list(res)
print(res)

###The Second
res = []
for x in a:
	if x not in res and x in b:
		res.append(x)
print(res)