Formula to replace pivot table in Excel 2019

Hi experts,

I have the following data and wishes to use a formula to replace pivot table. I googled that I can use the function Unique to do but as my version of excel is 2019, it don't allow me to use this function. Is there any other way? Thanks.

Number Type
4 a
5 b
18 c
17 d
5 e
4 f
12 g
8 h
5 i
15 j
16 k
3 l
3 a
20 b
16 c
19 d
13 e
13 f
19 g
20 h
18 i
7 j
3 k
7 l
4 a
9 b
18 c
11 d
16 e
2 f
17 g
15 h
7 i
4 j
8 k
11 l
16 a
11 b
2 c
18 d
20 e
2 f
16 g
3 h
9 i
17 j
10 k
4 l
8 l