On the first day of Christmas, my drug rep gave to me a partridge in a pear tree.

On the second day of Christmas, my drug rep gave to me, 2 ballpoint pens and a partridge in a pear tree.

On the third day of Christmas, my drug rep gave to me, 3 handy penlights, 2 ballpoint pens, and a partridge in a pear tree.

On the fourth day of Christmas, my drug rep gave to me, a 4-volume textbook, 3 handy penlights, 2 ballpoint pens, and a partridge in a pear tree.

On the fifth day of Christmas, my drug rep gave to me, a 5-lb ham, a 4-volume textbook, 3 handy penlights, 2 ballpoint pens, and a partridge in a pear tree.

On the sixth day of Christmas, my drug rep gave to me, 6 baseball tickets, a 5-lb ham, a 4-volume textbook, 3 handy penlights, 2 ballpoint pens, and a partridge in a pear tree.

On the seventh day of Christmas, my drug rep gave to me, a 7-course meal, 6 baseball tickets, a 5-lb ham, a 4-volume textbook, 3 handy penlights, 2 ballpoint pens, and a partridge in a pear tree.

On the eighth day of Christmas, my drug rep gave to me, 8 gift certificates, a 7-course meal, 6 baseball tickets, a 5-lb ham, a 4-volume textbook, 3 handy penlights, 2 ballpoint pens, and a partridge in a pear tree.

On the ninth day of Christmas, my drug rep gave to me, 9 holes of golf, 8 gift certificates, a 7-course meal, 6 baseball tickets, a 5-lb ham, a 4-volume textbook, 3 handy penlights, 2 ballpoint pens, and a partridge in a pear tree.

On the tenth day of Christmas, my drug rep gave to me, 10 movie tickets, 9 holes of golf, 8 gift certificates, a 7-course meal, 6 baseball tickets, a 5-lb ham, a 4-volume textbook, 3 handy penlights, 2 ballpoint pens, and a partridge in a pear tree.

On the eleventh day of Christmas, my drug rep gave to me, 11 oz of caviar, 10 movie tickets, 9 holes of golf, 8 gift certificates, a 7-course meal, 6 baseball tickets, a 5-lb ham, a 4-volume textbook, 3 handy penlights, 2 ballpoint pens, and a partridge in a pear tree.

On the twelfth day of Christmas, my drug rep gave to me, 12 long-stemmed roses, 11 oz of caviar, 10 movie tickets, 9 holes of golf, 8 gift certificates, a 7-course meal, 6 baseball tickets, a 5-lb ham, a 4-volume textbook, 3 handy penlights, 2 ballpoint pens, and a partridge in a pear tree.