#include<cstdio>
#include<vector>
#define N_MAX 50000
using namespace std;

vector<int>L[N_MAX+1];
int s[N_MAX], nr, n, m;
bool used[N_MAX+1];

void Read()
{
    int x, y, i;
    FILE *fin = fopen("sortaret.in","r");
    fscanf(fin,"%d%d",&n,&m);
    for(i=1; i<=m; i++)
    {
        fscanf(fin,"%d%d",&x,&y);
        L[x].push_back(y);
    }
    fclose(fin);
}

void DFS(int x)
{
    used[x] = true;
    for(vector<int>::iterator it = L[x].begin(); it!=L[x].end(); it++)
        if(!used[*it])
            DFS(*it);
    s[nr++] = x;
}

void Write()
{
    FILE *fout = fopen("sortaret.out","w");
    for(int i=nr-1; i>=0; i--)
        fprintf(fout,"%d ",s[i]);
    fprintf(fout,"\n");
    fclose(fout);
}

int main()
{
    Read();
    for(int i=1; i<=n; i++)
        if(!used[i])
            DFS(i);
    Write();
    return 0;
}