#include<fstream.h>
#include<stdlib.h>
#define dim 5000//1

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

unsigned long n,m,nn;

unsigned long *a[dim];
unsigned long v[dim];
char viz[dim];

void dfs(unsigned long vf)
{unsigned long c;
 nn++;
 v[nn]=vf;
 viz[vf]=1;
 for(c=1;c<=a[vf][0];c++)
  if(!viz[a[vf][c]]) dfs(a[vf][c]);
}


int main()
{unsigned long i,j,x,y;

f>>n>>m;
for(i=1;i<=n;i++)
{a[i]=(unsigned long*)realloc(a[i],sizeof(unsigned long));
 a[i][0]=0;
}

for(i=1;i<=m;i++)
{f>>x>>y;
 a[x][0]++;
 a[x]=(unsigned long*)realloc(a[x],a[x][0]*sizeof(unsigned long));
 a[x][a[x][0]]=y;
}
f.close();

for(i=1;i<=n;i++)
 if(!viz[i]) dfs(i);

for(i=1;i<=n;i++) g<<v[i]<<" ";

g.close();
return 0;
}