#include <cstdio>

using namespace std;
FILE *f,*g;

int start[50002],t[2][100002],n;
bool viz[50002];
int v[50002];

void dfs(int nod)
{
    int vecin,poz;
    viz[nod]=1;
    poz=start[nod];
    while(poz)
    {
        vecin=t[0][poz];
        if(!viz[vecin])
            dfs(vecin);
        poz=t[1][poz];
    }
    v[++v[0]]=nod;
}
int main()
{
    f=fopen("sortaret.in","r");
    g=fopen("sortaret.out","w");
    int m,x,y,k=0;
    fscanf(f,"%d %d",&n,&m);
    for(int i=1;i<=m;++i)
    {
        fscanf(f,"%d %d",&x,&y);
        t[0][++k]=y;
        t[1][k]=start[x];
        start[x]=k;
    }
    for(int i=1;i<=n;++i)
        if(!viz[i])
            dfs(i);
    for(int i=v[0];i>=1;--i)
        fprintf(g,"%d ",v[i]);
    fclose(f);
    fclose(g);
    return 0;
}