( I, U, O )                                                     : I                                                                 5E TEXT                                                         INSERT-BUF BUF-MOVE                                             INSERT-BUF COUNT #LAG ROT OVER MIN >R                           R R# +!                                                         R - >R                                                          DUP HERE R CMOVE                                                HERE #LEAD + R> CMOVE                                           R> CMOVE UPDATE                                                 DISPLAY-CURSOR ;                                                                                                            : O (SPREAD) P ;                                                : U C/L R# +! O ;                                                                                                               -->                                                             