Input (grade 13): BBC Radio 4 Extra, formerly known as BBC 7 and BBC Radio 7, is a British digital radio station broadcasting comedy, drama, and children's programming nationally 24 hours a day.
Output (grade 6): It plays comedy, drama, and children's programs 24 hours a day. It was called BBC 7 when it started in 2002 and was later renamed BBC Radio 7 in 2008.