Back in the days when recording artists released singles, “We Can Work It Out” made its debut in 1965. The Beatle’s manager, Brian Epstein, felt that the other song on the record, “Day Tripper,” was more commercial and so, should be the lead song. Typically, the lead song of a single is recorded on the top side (A side) and the other song (B side) goes beneath it. Since both songs became hits,…