First, the assignment states that you need to assign the values to the "smallest", "middle", and "largest" variables. In your code you are not assigning any values, you are just printing them to the screen.
You should do something more like this:
From the first IF statement, all we know is that input2 is larger than both input1 and input3. We don't know however between input1 and input3 which is larger or smaller. We just know what input2 is. The second ELSE IF we know that input2 is smaller than input1 and input3. Again we don't know from this statement whether input1 or input3 are bigger or smaller than eachother. Because of this, we can't print a final ascending order within each statement.
You will need to follow the above logic to finish assigning the variables for input1 and input3. then at the end, you can print the smallest, middle, and largest variable values like so:
Hope this helps. Let me know if you get stuck or need any further clarification.