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#include <bits/stdc++.h>
using namespace std;
ifstream fin("combinari.in");
ofstream fout("combinari.out");
int st[20],i,j,N,K;
void write()
{
for(int i=1 ; i<=K ; ++i)
fout<<st[i]<<' ';
fout<<'\n';
}
void backtracking(int k)
{
if(k == N + 1)
for(int i=st[k-1] + 1 ; i<=N ; ++i)
{
st[k]=i;
backtracking(k+1);
}
}
int main()
{
fin>>N>>K;
backtracking(1);
return 0;
}