#include <stdio.h>
#include <malloc.h>

long n;
long *x[50001],l[50001],s[50001],ts=0,ls=0,viz[50001];

void push(long val)
{
s[ts]=val;
ts++;
}

long get()
{
ts--;
return s[ts];
}

void cit()
{
long i,j,s,d,m;
FILE *f;
f=fopen("sortaret.in","r");
fscanf(f,"%d %d",&n,&m);

for(i=0;i<m;i++)
	{
		fscanf(f,"%d %*d",&s);
		l[s]++;
	}

fclose(f);

for(i=1;i<=n;i++)
{
x[i]=malloc(sizeof(long)*l[i]);
l[i]=0;
}

f=fopen("sortaret.in","r");
fscanf(f,"%*d %*d");
for(i=0;i<m;i++)
	{
	fscanf(f,"%d %d",&s,&d);
	x[s][l[s]]=d;
	l[s]++;
	}
}

void tip()
{
long i,j;
for(i=1;i<=n;i++)
        {
        printf("%d : ",i);
        for(j=0;j<l[i];j++)
        printf("%d ",x[i][j]);
        printf("\n");
        }
}

void df(long sp)
{
long i;
viz[sp]=1;
for(i=0;i<l[sp];i++)
if(!viz[x[sp][i]])df(x[sp][i]);
push(sp);
}

void outf()
{
FILE *f;
f=fopen("sortaret.out","w");
long i;
for(i=ts-1;i>0;i--)
{
if(viz[s[i]]==1)
{
fprintf(f,"%d ",s[i]);
viz[s[i]]=0;
}

}
fprintf(f,"%d\n",s[0]);
fclose(f);
}

int main()
{
long i;
cit();
for(i=1;i<=n;i++)
if(!viz[i])
{
df(i);
}
//printf("\n");
//tip();

outf();
return 0;
}