#include <iostream>
#include <stdio.h>

using namespace std;

FILE *f=fopen("sortaret.in","r");
FILE *g=fopen("sortaret.out","w");


int nr,i,n,m,p[50006],viz[50006],a[10006][10006];


void citire(int m)
{
    int i,x,y;
    for(i=1;i<=m;i++)
    {
        fscanf(f,"%d%d",&x,&y);
        a[x][y]=a[y][x]=1;
    }
}

void df(int i)
{
    int j;
    viz[i]=1;
    for(j=1;j<=n;j++)
    if(!viz[j]&& a[i][j])
    df(j);
    p[++nr]=i;
}

void solve()
{
    for(i=1;i<=n;i++)
    if(!viz[i])df(i);
    for(i=n;i>=1;i--)
    fprintf(g,"%d ",p[i]);
}

int main()
{
    fscanf(f,"%d%d",&n,&m);
    citire(m);
    nr=0;
    solve();

    fclose(g);
    return 0;
}