Highlight Duplicates from Two Columns with Different Colours

I have two columns A1 (Section X) and B1 (Section Y)

Each column has 20 rows of data (A2-B21) such as:
X Y
1 33
2 34
3 35
4 36
5 37
3 35
7 39
8 40
9 41
10 42
11 43
12 44
10 42
14 46
10 42
16 48
17 49
18 50
19 51
20 52

What I need is either dynamic formula or macros that can do the following:

1) Assess range A2-B21;

2) Identify sets of duplicates based on the identical values in both columns - for example in this case there are two sets of duplicates:

-Set 1: A4 (4)/B4(36) is identical with A7/(4)B7(36); and

-Set 2: A11(10)/B11(42) is identical with: A14(10/B14(42) is identical with A16(10)|B16 (42)

3) Highlight cells that contain sets of duplicates with different colors – for example:

Cell color for Set (A4 /B4 & A7/B7) should be different to cell color for Set 2 (A11/B11, A14/B14 & A16|B16).

This coloring should be dynamic – data in this table is updated on adaily basis so as the number of duplicates will vary all the time.

Thanks in advance

Hi Dilipandey

This formula highlights all sets of duplicates but with the same color. What I needed was something that can select different color for each set of duplicates as outlined in my original thread. For example, Cell color for Set (A4 /B4 & A7/B7) should be different to cell color for Set 2 (A11/B11, A14/B14 & A16|B16).

Regards
David

My apologies for some errors.
The right list is provided below along with the attachment.

X Y
1 33
2 34
4 36
3 35
5 37
4 36
7 39
8 40
9 41
10 42
11 43
12 44
10 42
14 46
10 42
16 48
17 49
18 50
19 51
20 52