Ah, Lefty, Lefty, Lefty! A great SS Muppet, who was also a heckuva singer and dancer!
My favorite Lefty sketches include:
The Golden AN - Lefty has trouble remembering his orders to lift the Golden AN, and as a result, is caught by a policeman named Dan, and poor Lefty is forced to spend "ten days in the can."
The classic Invisible Ice Cream Cone sketch, with Ernie.
Lefty recites the alphabet, and receives a lollipop from his boss.
The "Elephant Picture" routine, with Ernie.
Stop Sign - Lefty tries to sell Ernie a Stop sign.
And, of course, the memorable "Would You Like to Buy an O?"
SHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH!
Riiiiiiiiiiiiiiight!