Your input statement should have enough variables to match your data but you only list two. Do you want the data to look as shown or do you want it reformatted to a long format like:
a 42
a 17
a 24
If you want the wide format, add the rest of the variables to your list, reponse1-response5.
If you want the long format you need to use a trailing @@ to hold the line when reading the data.