a = [1,1,23,75,75,8]
b = [9,199,199,75,2]
c = [46,84,131,75,4]

#1
d = a + b + c
d.sort()
print(d)
#

#2
d.clear()

d = list(set(a)) + list(set(b)) + list(set(c))
print(d)
#

#3
d.clear()

d = list(set(a) & set(b) & set(c))
print(d)
#

#4
d.clear()
e = a + b + c

for i in e:
    for k in range(2, i):
        if i % (k) == 0:
            break
        elif k == i - 1:
            d.append(i)

e.clear()
e = list(set(d))

print(e)
#