#include <cstdio>
#include <cstdlib>

using namespace std;

int n, m, *a[100005], checked[100005], time, ft[100005], c[100005], peak;

void dfs(int x)
{
    checked[x] = 1;
    ++time;

    for (int i = 1; i <= a[x][0]; ++i)
        if (!checked[a[x][i]])
            dfs(a[x][i]);

    ft[x] = ++time;
    c[++peak] = x;
}

int main()
{
    FILE *in, *out;
    in = freopen("sortaret.in", "r", stdin);
    out = freopen("sortaret.out", "w", stdout);

    scanf("%d%d", &n, &m);

    for (int i = 1; i <= n; ++i) {
        a[i] = (int *)realloc(a[i], sizeof(int));
        a[i][0] = 0;
    }

    for (int i = 1; i <= m; ++i) {
        int x, y;
        scanf("%d%d", &x, &y);

        ++a[x][0];
        a[x] = (int *)realloc(a[x], (a[x][0] + 1) * sizeof(int));
        a[x][a[x][0]] = y;

        ++a[y][0];
        a[y] = (int *)realloc(a[y], (a[y][0] + 1) * sizeof(int));
        a[y][a[y][0]] = x;
    }

    for (int i = 1; i <= n; ++i)
        if (!checked[i])
            dfs(i);

    for (int i = n; i; --i) printf("%d ", c[i]);

    fclose(out);
    return 0;
}