#include<stdio.h>
void print_numbers(int n,int current){
    if(current > n)return;
    
    if(current % 2 == 0)printf("%d",current);
    print_numbers(n,current + 1);
}
void print_odds(int n, int current){
    if(current > n)return;
    
    if(current % 2! = 0){
    printf("%d",current);
    print_odds(n,current + 1);
}
int main(){
    int n;
    scanf("%d", &n);
    
    if(n,1){
        printf("Invalid input\n");
        
    }else{
        print_numbers(n,1);
        printf("\n");
        print_odds(n,1);
        printf("\n");
    }
    return 0;