Sometimes a B-side can turn into an A-side. Case in point: Mary Wells’ “You Lost The Sweetest Boy” was the A-side which entered the Billboard chart on 9/28/63 and spent nine weeks on, peaking at #22. On 10/19/63 the flip, “What’s Easy For Two...” hit the chart and spent 17 weeks on, peaking at #29. Of course, the split airplay hurt both sides from moving higher. Both sides could have been Top Ten hits.