I am trying to figure out how to do this and its really frustrating.

This is what i have in two different Cells

cell 1: "w1,w2,w3"
cell 2: "w2,w8,w6"


I want to combine cell 1 and cell 2 and remove duplicate string values...

This is the result i want
Cell:"w1,w2,w3,w8,w6"

can someone please help me solve this issue?

-Amrit