Find double numbers function...

Dear excellers,
being trying to figure out-all day this simple function:

I have 10 numbers each from 1-50 i.e.

7,11,33,33,9,9,12,8,12,11

I need a function which list all 4 double numbers.

result should be: 9,33,12,11

I tryed everything and still cannot get it to work please help

PS 10 cells for the 10 numbers list and 3 cells for the first 4 doubles.

With
A2:J2 containing numbers

This ARRAY FORMULA, committed with CTRL SHIFT ENTER
(instead of just ENTER) returns the 1st instance of a duplicated number:

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Copy I2 and paste into J2:T2 to complete the list of duplicated values.

In your example, the formulas return these values (in the order encountered):
I2: 11
J2: 33
K2: 9
L2: 12
M2: (blank)

Is that something you can work with?

thanks for your time replying...but I still cannot get it to work!

see screen shot
what I need is 4 returned doubles finded from 10 numbers:
http://www.graphic-elite.com/figure.jpg

result
when I use your formula it finds the first double but not on the second! and also I donot what know what this blue index box does it needs to be all horizon. I think I donot use it correctly:
http://www.graphic-elite.com/figure2.jpg

I suspect you are not committing the formulas with CTRL+SHIFT+ENTER.
The attached workbook demonstrates how the formulas work.

Does that help?
Post back with more questions.