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