#include <bits/stdc++.h>
#define DIM 50010
using namespace std;
ifstream fin("sortaret.in");
ofstream fout("sortaret.out");
int n,m,i,x,y,k,r,t[DIM],sol[DIM];
vector<int> L[DIM];
bitset<DIM> f;
void dfs(int nod) {
    f[nod]=1;
    sol[++k]=nod;
    for (int i=0;i<L[nod].size();i++) {
        int vecin=L[nod][i];
        if (f[vecin]==0)
            dfs(vecin);
    }
}
int main() {
    fin>>n>>m;
    for (i=1;i<=m;i++) {
        fin>>x>>y;
        L[x].push_back(y);
        t[y]=x;
    }
    for (i=1;i<=n;i++)
        if (t[i]==0) {
            r=i; break;
        }
    dfs(r);
    for (i=1;i<=k;i++)
        fout<<sol[i]<<" ";
    return 0;
}