def yakusu(n):
    ans = 0
    for i in range(1, int(n ** (1 / 2)) + 1):
        if n % i == 0:
            if i != n ** (1 / 2):
                ans += 2
            else:
                ans += 1
    return ans

n = int(input())

ans = []
tmp = 10 ** 20
for i in range(1, n // 2 + 1):
    if tmp > abs(i - yakusu(i) - ((n - i) - yakusu(n - i))):
        tmp = abs(i - yakusu(i) - ((n - i) - yakusu(n - i)))
        ans = [(i, n - i)] 
    elif tmp == abs(i - yakusu(i) - ((n - i) - yakusu(n - i))):
        ans += [(i, n - i)] 

for i in range(len(ans)):
    print(ans[i][0], ans[i][1])

for i in range(len(ans) - 1, -1, -1):
    print(ans[i][1], ans[i][0])