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#include <fstream>
using namespace std;
ifstream f("submultimi.in");
ofstream g("submultimi.out");
short n,v[20];
bool viz[20];
void back(int k)
{
for(int i=v[k-1]+1;i<=n;++i)
{
if(!viz[i])
{
viz[i]=1;
v[k]=i;
for(int j=1;j<=k;++j) g<<v[j]<<' ';
g<<'\n';
if(k<n) back(k+1);
viz[i]=0;
}
}
}
int main()
{
f>>n;
back(1);
return 0;
}