Input (grade 13): Kelly's Top 40 singles on the National charts have been his 1980s releases "Billy Baxter", "Before Too Long", "Darling it Hurts", "To Her Door" and "Dumb Things", and his 2000 single "Roll on Summer".
Output (grade 12): Kelly's Top 40 singles on the National charts were his 1980s songs "Billy Baxter", "Before Too Long", "Darling it Hurts", "To Her Door", "Dumb Things", and his 2000 single "Roll on Summer".