Extract words from cells into a new cell

Dear forum,

I have cells that includes text, numbers etc and I need to extract the text into a new cell (kind of cleanup)

It looks like this:

1: Light Yellow: 1,00, 8: Dark Green: 1,00, 12: Light Blue: 2,00

item number: item name: amount with decimal,

What I need is to extract the item name with a " + " as a separator if there is more items in the cell.
So for this example it would be:
Light Yellow + Dark Green + Light Blue

Sample file attached

Thanks

And just in case, a formula solution

Formula:

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	A	B
1	Before	Result
2	1: Light Yellow: 1,00, 8: Dark Green: 2.00, 13: Blue: 1,00	Light Yellow + Dark Green + Blue
3	4: Orange: 1,00	Orange
4	4: Orange: 1,00, 6: Light Grey: 1,00, 8: Dark Green: 1,00	Orange + Light Grey + Dark Green
5	6: Light Grey: 2,00, 8: Dark Green: 1,00, 13: Blue: 2,00	Light Grey + Dark Green + Blue
6	2: Black: 1,00, 4: Orange: 2,00, 6: Light Grey: 1,00	Black + Orange + Light Grey