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#include<bits/stdc++.h>
using namespace std;
ifstream fin("submultimi.in");
ofstream fout("submultimi.out");
void subString(string str, int n)
{
for (int len = 1; len <= n; len++)
{
for (int i = 0; i <= n - len; i++)
{
int j = i + len - 1;
for (int k = i; k <= j; k++)
fout << int(str[k]) - '0' << " ";
fout << "\n";
}
}
}
int main()
{
int n;
fin >> n;
string str;
for(int i=1;i<=n;i++) {
str+=to_string(i);
}
subString(str, str.length());
return 0;
}