quick awk/sed question: how to add characters in a line

Have many long lines like the following:

(AA 10, (xxx-xx-xxx) BB, 200 A)
(Test 20, (YYY-YY-YYY) DCB, 100000 BBB)

How to add a comma to the positions which do not have?
Expected output is
(AA, 10, (xxx-xx-xxx), BB, 200, A)
(Test, 20, (YYY-YY-YYY), DCB, 100000, BBB)

Preferred awk/sed, but perl is OK too.
Thanks in advance.
Who is Participating?
ozoConnect With a Mentor Commented:
sed 's/\([^ ,]\) /\1, /g'  <<END
(AA 10, (xxx-xx-xxx) BB, 200 A)
(Test 20, (YYY-YY-YYY) DCB, 100000 BBB)
jl66Author Commented:
ozo, you have always been helpful. I really appreciate.
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