#

  Ping pong function reassignment, despite 26 uppercase letters,
  new functions can be reassigned to uppercase letters, so programs
  should technically be infinite in length.
  
#

:':"R is now using U''''s function"!':,R:,U
:':"R is now using V''''s function"!':,R:,V
:':"R is now using V''''s function"!':,R:,W
:':"R is now using X''''s function"!':,R:,X
:':"R is now using Y''''s function"!':,R:,Y
:':"R is now using Z''''s function"!':,R:,Z
:URVRWRXRYRZRL:,L
L