#include<stdio.h>
#include<stdlib.h>
#define N 50005
int n,m;
int *a[N],deg[N],cate[N],sol[N];
void citire()
{
	int x,y;
	scanf("%d%d",&n,&m);
	for(int i=0; i<m; i++)
	{
		scanf("%d%d",&x,&y);
		//if((cate[x]&7)==0)
			a[x]=(int*)realloc(a[x],sizeof(int)*(cate[x]+1));
		a[x][cate[x]++]=y;
		deg[y]++;
	}
}
void rezolva()
{
	int i,x,j;
	for(i=1; i<=n; i++)
		if(!deg[i])
			sol[++sol[0]]=i;
	for(i=1; i<=n; i++)
	{
		x=sol[i];
		for(j=0; j<cate[x]; j++)
		{
			deg[a[x][j]]--;
			if(!deg[a[x][j]])
				sol[++sol[0]]=a[x][j];
		}
	}
}
void scrie()
{
	for(int i=1; i<n; i++)
		printf("%d ",sol[i]);
	printf("%d\n",sol[n]);
}
int main()
{
	freopen("sortaret.in","r",stdin);
	freopen("sortaret.out","w",stdout);
	citire();
	rezolva();
	scrie();
	return 0;
}