КУБЫ

def print_set(arr):
    print(len(arr))
    for i in sorted(arr):
        print(i, end = ' ')
    print()

n, m = map(int, input().split())
first, second = set(), set()

for i in range(n):
    first.add(int(input()))
for i in range(m):
    second.add(int(input()))

print_set(first & second)
print_set(first - second)
print_set(second - first)