#include<iostream> using namespace std; const int N = 30; int a[N], n, m; void f(int x){ if(x == m + 1){ for(int i = 1; i <= m; i++) cout << a[i]; cout << endl; return; } for(int i = a[x-1] + 1; i <= n; i++){ a[x] = i; f(x + 1); } } int main(){ cin >> n >> m; f(1); return 0; }