R

 R  is the 1 8  t h  letter  of the English  alphabet. It first sponsored  SESAME STREET  in episode 00 11 , after sponsoring some of the  test episode s.

Sketches about R

 * The  R  Machine (  Ernie  &  Bert  )
 * The Type write r -  R  - Rope
 *  Harvey Knee slapper  ’ s tell s the mailman that he has a letter for his mother ... the letter  R  !

The Muppet Show

 * In a running gag carried on through episode 11 5  of  The Muppet Show ,  Fozzie  claim s to have a letter for  KERMIT THE FROG  . That letter turn s out to be the letter  R  .  KERMIT  tries to play the same joke on  Scooter  , who isn ' t so easily dupe d.