// 1070. Permutations #include using namespace std; int main() { static int num; scanf("%d", &num); if (num == 1) printf("1 "); else if (num <= 3) printf("NO SOLUTION\n"); else { for (int i = 2; i <= num; i += 2) printf("%d ", i); for (int i = 1; i <= num; i += 2) printf("%d ", i); } }