Need to Reverse the name by uppercase and with comma without space afer comma, to below conduction

need to reverse name by half part like below

ALL UPPER CASE
1 to 3 words reverse 1 last word
3 to 5 words reverse 2 last word
6 words above reverse 3 last word

name EG ( mahesh m.k.l. ) There are 4 words we take space and dot as one word.


EG NAME INOUT AND OUTPUT

Srinivas SRINIVAS
srinivas m M,SRINIVAS

srinivas m.j. J,SRINIVAS M.

srinivas m.j.h. J.H,SRINIVAS M.

srinivas m. j. h. k. H. K,SRINIVAS M. J.

srinivas m. j. h. k. l. H. K. L,SRINIVAS M. J.

Above are input and out put EG.
need to take as it is input with reverse uppercase