#include <fstream>
#include <vector>

using namespace std;

ifstream f("sortaret.in");
ofstream g("sortaret.out");

int n,m,i,x,p,u,y,grad[50005],c[50005];

vector<int> l[50005];
vector<int>::iterator it;

int main() {
    f>>n>>m;
    for(i=1;i<=m;i++) {
        f>>x>>y;
        l[x].push_back(y);
        grad[y]++;
    }
    u=0;
    for(i=1;i<=n;i++)
        if(grad[i]==0) {
            u++;
            c[u]=i;
        }
    p=1;
    while(p<=u) {
        x=c[p];
        for(it=l[x].begin();it!=l[x].end();it++) {
            grad[*it]--;
            if(grad[*it]==0)
                c[++u]=*it;
        }
        p++;
    }
    for(i=1;i<=u;i++)
        g<<c[i]<<" ";
    g<<"\n";
    return 0;
}