static PrintWriter out;

static Reader in;

public static void main(String[] args) throws IOException {

// in = new Reader(new FileInputStream(args[0])); // test.

input_output();

Permutations solver = new Permutations();

solver.solve();

out.close(); // remove test.

out.flush(); // remove test.

}

static long INF = (long) 1e16;

static int maxn = (int) 1e5 + 5;

static int mod = (int) 1e9 + 7;

void solve() throws IOException {

int n = in.nextInt();

if (n == 1) {

out.println("1");

return;

}

if (n <= 3) {

out.println("NO SOLUTION");

return;

}

List<Long> firstElements = new ArrayList<>();

List<Long> secondElements = new ArrayList<>();

for (int i = 1; i <= n; i++) {

if (i % 2 == 0)

firstElements.add((long) i);

else

secondElements.add((long) i);

}

firstElements.addAll(secondElements);

for (long i : firstElements) {

out.print(i + " ");

}

}

static class Reader {

private InputStream mIs;

private byte[] buf = new byte[1024];

private int curChar;

private int numChars;

public Reader() {

this(System.in);

}

public Reader(InputStream is) {

mIs = is;

}

public int read() {

if (numChars == -1) {

throw new InputMismatchException();

}

if (curChar >= numChars) {

curChar = 0;

try {

numChars = mIs.read(buf);

} catch (IOException e) {

throw new InputMismatchException();

}

if (numChars <= 0) {

return -1;

}

}

return buf[curChar++];

}

public String nextLine() {

int c = read();

while (isSpaceChar(c)) {

c = read();

}

StringBuilder res = new StringBuilder();

do {

res.appendCodePoint(c);

c = read();

} while (!isEndOfLine(c));

return res.toString();

}

public String next() {

int c = read();

while (isSpaceChar(c)) {

c = read();

}

StringBuilder res = new StringBuilder();

do {

res.appendCodePoint(c);

c = read();

} while (!isSpaceChar(c));

return res.toString();

}

double nextDouble() {

return Double.parseDouble(next());

}

public long nextLong() {

int c = read();

while (isSpaceChar(c)) {

c = read();

}

int sgn = 1;

if (c == '-') {

sgn = -1;

c = read();

}

long res = 0;

do {

if (c < '0' || c > '9') {

throw new InputMismatchException();

}

res *= 10;

res += c - '0';

c = read();

} while (!isSpaceChar(c));

return res * sgn;

}

public int nextInt() {

int c = read();

while (isSpaceChar(c)) {

c = read();

}

int sgn = 1;

if (c == '-') {

sgn = -1;

c = read();

}

int res = 0;

do {

if (c < '0' || c > '9') {

throw new InputMismatchException();

}

res *= 10;

res += c - '0';

c = read();

} while (!isSpaceChar(c));

return res * sgn;

}

public boolean isSpaceChar(int c) {

return c == ' ' || c == '\n' || c == '\r' || c == '\t' || c == -1;

}

public boolean isEndOfLine(int c) {

return c == '\n' || c == '\r' || c == -1;

}

}

static void input_output() throws IOException {

File f = new File("hello.in");

if (f.exists() && !f.isDirectory()) {

in = new Reader(new FileInputStream("hello.in"));

} else

in = new Reader();

f = new File("out.txt");

if (f.exists() && !f.isDirectory()) {

out = new PrintWriter(new File("out.txt"));

} else

out = new PrintWriter(System.out);

}