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#include <bits/stdc++.h>
using namespace std;
ifstream in("submultimi.in");
ofstream out("submultimi.out");
int n, s[21];
void print(int k){
for(int i = 1; i <= k; i++) out << s[i] << ' ';
out << '\n';
}
void back(int k, int v){
int i;
for(i = s[k-1] + 1; i <= n; i++){
s[k] = i;
if(k == v) print(v);
else back(k+1, v);
}
}
int main(){
in >> n;
for(int i = 1; i <= n; i++){
back(1, i);
}
return 0;
}