Working-script modification

I have been using the following script which keeps the first seven word of the string and replaces the rest of it with ten dots, for example:

these first seven words will be kept and the rest of this sentence will be replaced with ten dots
these first seven words will be kept ..........

This script, though, halts once the string is less than seven (which can be modified as needed), thus I need:

1. to have the script modified to ignore and leave any string that has a number of words less than the required number (which is seven for now) without changing it or adding any dots to it.

2. to have the new modified script to be modified again as a second script to work from the end of the string, so it keeps the last seven words and replaces the rest of the string to the beginning with ten dots, accordingly our previous example will be:

.......... sentence will be replaced with ten dots

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Can I get some precious help with these two requests?

Many thanks in advance ..
T.

Hi Robert,
Just got the chance to run your masterpiece codes .. they smoothly did the job as exactly as desired. Now I can go ahead with my work : )
I really don't know how to thank you mate, but please accept my deep respect and gratitude.
My best regards,
T.

That was more than a satisfactory solution Robert. You do have a great value added to this world .. always ahead ..

T.