There are 15 sweets on the table. How many sweets do you wish to take?
> 3
There are 12 sweets on the table. I take 3. There are 9 sweets on the table. How many sweets do you wish to take?
> 3
There are 6 sweets on the table. I take 3. There are 3 sweets on the table. How many sweets do you wish to take?
> 2
There are 1 sweets on the table. I take 1. There are 0 sweets on the table. You are a winner!!!

face it dude, you need to lay off the weed for a while :)