#include<cstdio>
#define N 50001
int n,i,j,k,m,c[N],*g[N],a[2*N],b[2*N],w[N],v[N],t;

int C(int g[N],int n,int x)
{for(int i=0;i<n;i++)
if(g[i]==x)
      return 1;
return 0;}

void E(int i)
{int j;
c[i]=1;
for(j=w[i]-1;j>=0;j--)
if(!c[g[i][j]])
      E(g[i][j]);
v[++t]=i;}

int main()
{freopen("sortaret.in","r",stdin);
freopen("sortaret.out","w",stdout);
scanf("%d%d",&n,&m);
for(k=1;k<=m;k++)
      scanf("%d%d",&a[k],&b[k]),w[a[k]]++;
for(i=1;i<=n;w[i++]=0)
      g[i]=new int[w[i]];
for(k=1;k<=m;k++)
if(!C(g[a[k]],w[a[k]],b[k]))
      g[a[k]][w[a[k]]++]=b[k];
for(i=1;i<=n;i++)
if(!c[i])
      E(i);
for(j=n;j;j--)
      printf("%d ",v[j]);
return 0;}