#include <iostream>
int main() {
   int N = 3;
   int M = 4;
   for (int i = 0; i < N; i++) {
      for (int j = 0; j < M; j++) {
         if (j == 2) {
           break;
         }
         std::cout << j; 
      }
      std::cout << " ";
   }
}