import itertools
import numpy as np

X = int(input())

#それぞれの約数の個数
yakusu = np.array([2]*(X+1))
yakusu[0] = 0
yakusu[1] = 1

for i in range(2,X//2+1):
    yakusu[2*i::i] += 1
    
fn = np.array([0]*(X+1))
for i in range(1,X+1):
    fn[i] = i - yakusu[i]
    
#print(yakusu[1:X+1])
#print(fn[1:X+1])

minimum = float('inf')
for u in range(1,X//2+1):
    v = X-u
    tmp = abs(fn[u]-fn[v])
    #print(u,v,tmp)
    if tmp < minimum:
        ans = {}
        ans[tmp] = [(u,v)]
        minimum = tmp
    elif tmp == minimum:
        ans[tmp].append((u,v))

for r in ans[minimum]:
    u, v = r
    print(u, v)

for r in ans[minimum][::-1]:
    u, v = r
    print(v,u)