gold

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include <ctype.h>

int primo(n)
{
    int i , p=0;
    for(i = 1; i <= n ; i++)
        {
            if ((n % i) == 0 && n != 1)
                p ++;
        }
    if(p == 2)
        return 1;
    else
        return 0;
    p = 0;
}

int main()
{
    int n , r1 , r2;
    int aux1 , aux2 , flag=0;
    do
    {
        aux1 = aux2 = flag = 0;
        scanf("%d" , &n);
        if(n == 0)
            break;
        if(n % 2 != 0 && n > 1)
            printf("erro\n");
        else if(n > 2 && n < 1000000)
        {

            aux1 = n;
            aux2 = 0;
            while(flag == 0)
            {
                aux1--;
                aux2++;
                if(primo(aux1) == 1 && primo(aux2) == 1 )
                    flag = 1;
            }
            if(aux1 + aux2 == n)
                printf("%d %d\n" , aux2 , aux1);
        }


    }while(n != 0);







    return 0;
}