Power BI: lookup and return for a new column specific values in a String

I have a column with labels from the Microsoft Planner, similar with this example:

Suppose that GAB and LET are acronym for departments and I need to create a column that indicates which department own that line. The result must be this:

how can I do this at power bi (or query)?

I thought in something using lookupvalue or trying to split the string with the marker ";", but is not working. Some idea?

Thanks

Breno

In powerquery you can try this to look for specific items on each row

let  Source = #table({"Labels"}, {{"GAB;TIC;COMP;AQUI"}, {"TIC;COMP;LET"},{"TIC;LET;PD"},{"AQUI;PD;gab"}}),
FindList = Table.Buffer(#table({"Keyword"}, {{"GAB"}, {"LET"}})),
#"Changed Type" = Table.TransformColumnTypes(Source,{{"Labels", type text}}),
#"Added Custom" = Table.AddColumn(#"Changed Type", "Custom", each List.Select(FindList[Keyword], (x) => Text.Contains([Labels], x, Comparer.OrdinalIgnoreCase))),
#"Added Custom1" = Table.AddColumn(#"Added Custom", "Department", each Text.Combine([Custom], ", ")),
#"Removed Columns" = Table.RemoveColumns(#"Added Custom1",{"Custom"})
in #"Removed Columns"

remove the

, Comparer.OrdinalIgnoreCase

part if you want the check to be case-specific so that GAB<>gab