Need to group same name

[sruthesanju (Sweety)]

My input is
Dep(First),Chi(First),Chi(Second)
My output should be
Dep(First),Chi(First,Second)My input is
Dep(First),Chi(First),Chi(Second)
My output should be
Dep(First),Chi(First,Second)

If my input is Dep(First),Chi(First)
My output should be
Dep(First, Second),Chi(First, Second)

If my input is Dep(First)
My output should be Dep(First)

If My input is
Dep(First),Chi(First),Dep(Second),Chi(Second)
My output should be
Dep(First),Chi(First,Second)

How to do this in regex with group by

[sven.wullum1]

@sruthesanju

If my input is Dep(First),Chi(First)
My output should be
Dep(First, Second),Chi(First, Second)

Hi! I think I have the pattern down, but this threw me off is that the desired output?