# coding: utf-8
# Your code here!
def count(num):
    N=int(num**0.5)//1
    
    count=0
    for i in range(1,N+1):
        if num/i==num//i:
            count+=2
    if num**0.5==N:
        count-=1
    return count

X=int(input())

A=X//2

ans=[]

for a in range(1,A+1):
    b=X-a
    fa=a-count(a)
    fb=b-count(b)
    score=abs(fa-fb)
    ans.append([score,a,b])
    ans.append([score,b,a])
ans.sort(key=lambda x: x[1])    
ans.sort(key=lambda x: x[0])

base=ans[0][0]
index=0
while ans[index][0]==base:
    print(ans[index][1],ans[index][2])
    if ans[index]==ans[index+1]:
        index+=1
    index+=1