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#include <iostream>
#include <fstream>
using namespace std;
ifstream in("combinari.in");
ofstream out("combinari.out");
int n,x,st[100];
void output(int k)
{
for(int i=1; i<=k; i++)
{
out<<st[i]<<" ";
}
out<<"\n";
}
bool sol ( int k )
{
return ( k == x );
}
void back(int k)
{
for(int i = st[k-1]+1; i<=n; i++)
{
st[k]=i;
if(sol(k))
output(k);
else
back(k+1);
}
}
int main(void)
{
in>>n>>x;
back(1);
}