Match a string and the 5 characters before and after

Match a string and the 5 characters before and after

I need to match the string one or two and the 5 characters before and after
with the following text in input
Lorem Ipsum is simply dummy one text of the printing and typesetting
industry. Lorem Ipsum has been the industry's standard dummy text ever
since the 1500s, when an unknown printer took a galley of type and
scrambled it to make a type specimen two book. It has survived not only
five centuries, but also the leap into electronic typesetting, remaining
essentially unchanged. It was popularised in the 1960s with the release of
Letraset sheets containing Lorem Ipsum passages, and more recently with
desktop publishing software like Aldus PageMaker including versions of
Lorem Ipsum.
the output should be
ummy one text
imen two book
the regex should works with the scan method in ruby