What is the output of the below program?

int main()

{

   int i = 0;

   for (i=0; i<20; i++)

   {

     switch(i)

     {

       case 0:

         i += 5;

       case 1:

         i += 2;

       case 5:

         i += 5;

       default:

         i += 4;

         break;

     }

     printf("%d  ", i);

   }

   return 0;

}