#include <stdio.h>

int main(void) {

  int a, b;

  scanf("%d%d", &a, &b);

  int c = a;

  for(int i=1;i<=b-a+1;i++){
    
    if(c%3==0||c/3==3||c%3==3){
      printf("%d\n", c);
    }

    c++;
  }

  return 0;
}