#include <cstdio>
#include <vector>
using namespace std;
int i, N, M, x, y, Sel[50001];
vector<int> G[50001], Stiva;
inline void DF(int x)
{
    Sel[x]=1;
    for (vector<int>::iterator it=G[x].begin(); it!=G[x].end(); it++)
        if (!Sel[*it]) DF(*it);
    Stiva.push_back(x);
}
int main()
{
    freopen("sortaret.in","r",stdin);
    freopen("sortaret.out","w",stdout);
    scanf("%d%d", &N, &M);
    for (i=1; i<=M; i++)
    {
        scanf("%d%d", &x, &y);
        G[x].push_back(y);
    }
    for (i=1; i<=N; i++)
        if (!Sel[i]) DF(i);
    for (i=Stiva.size()-1; i>0; i--) printf("%d ",Stiva[i]);
    return 0;
}