overlay (combine) lines

[ry2ngh]

I am trying to figure out how to overlay lines of code.

For example, if I have the following two lines, how can i combine the
non blanks into one line.

-----before overlay--------------
  one           three
          two             four

-------after overlay--------------
  one   two  three   four

In the past on a mainframe I was able to do this using a primative
line editor by typing an M and O on the line numbers as follows:

00M001  one           three
00O002          two             four

resulting in only one line:
0000001 one   two   three  four


Thanks in advance,

-Ryan