def nguyento(so):
    if so < 2:
        return False
    for i in range(2, int(so ** 0.5) + 1):
        if so % i == 0:
            return False
    return True

def timcapnguyento(n):
    cap = []
    for i in range(2, n):
        if nguyento(i) and nguyento(n - i):
            cap.append((i, n - i))
    return cap

n = int(input("Nhập số nguyên n: "))
cap = timcapnguyento(n)

if cap:
    for r in cap:
        print(str(r[0]) + ", " + str(r[1]))
else:
    print("Không")

def NT(n):

    if n < 2:

        return False

    for i in range(2, int(n**0.5) + 1):

        if n % i == 0:

            return False

    return True

n = int(input())

f = True

for i in range(2, n // 2 + 1):

    if NT(i) and NT(n - i):

        print(f"{i}, {n - i}")

        f = False

        break

if f == True:

    print("khong")