#include<cstdio>
#include<vector>
#define N 50010
using namespace std;
int n,m,x,y,g[N],s[N],i;
vector<int > v[N] ;
vector<int>::iterator it;
int main()
{
    freopen("sortaret.in","r",stdin);
    freopen("sortaret.out","w",stdout);
    scanf("%d%d",&n,&m);
    for(;m;m--)
    {
        scanf("%d%d",&x,&y);
        v[x].push_back(y);
        g[y]++;
    }
    for(i=1;i<=n;i++) if(g[i]==0) s[++m]=i;
    for(i=1;m<n;i++)
    {
        for(it=v[s[i]].begin();it!=v[s[i]].end();it++)
        {
            g[*it]--;
            if(!g[*it]) s[++m]=*it;
        }
    }
    for(i=1;i<=m;i++) printf("%d ",s[i]);
    return 0;
}