Hoping to rebound from their home loss to the Saints, the Bills flew to Land Shark Stadium for a Week 4 AFC East duel with the Miami Dolphins.  After a scoreless first quarter, Buffalo would find themselves trailing in the second as Dolphins kicker Dan Carpenter got a 33-yard field goal, followed by cornerback Vontae Davis returning an interception 23 yards for a touchdown.  The Bills would get on the board with a 35-yard field goal from kicker Rian Lindell, but Miami would answer with running back Ronnie Brown's 1-yard touchdown run. The Dolphins' domination continued into the third quarter with quarterback Chad Henne completing a 5-yard touchdown pass to wide receiver Brian Hartline, followed by a 1-yard touchdown run by running back Ricky Williams.  Buffalo tried to salvage the game in the fourth quarter with quarterback Trent Edwards completing a 3-yard touchdown pass to wide receiver Josh Reed, but Miami would close out the game with Brown's 4-yard touchdown pass.
Question: How many yards were gained on touchdown receptions?
Answer: 12