Collect all used symbols/letters from a Column

[wali]

Hello every one,
I have two worksheets: "1" and "2" Now i want to filter all symbols used in Column A sheet "1" and list them in Column A of sheet "2". The results should

contain no duplicates.

For example:
_________________________
S1, Column A

love
story
history
forum
stra~e
m§ger
w+&tte
searچ

Now i need a makro which gives following result in column A of sheet "2" (!no duplicates!):

2, Column A

l
o
v
e
s
t
r
y
h
i
f
u
m
a
~
§
g
w
+
چ

________

Thanks for each assistance in advance.