Find a value in a range of cells as a substring

Question

On tab 1, I have a column where each cell in that column has a group of numbers, and another column where that group of numbers is associated with a name. Example:

Answer 1

Entered as an array formula (Ctrl-Shift-Enter) and copied down, this works:

=INDEX($B$1:$B$4,MATCH(TRUE,ISNUMBER(SEARCH(","&D8&",",","&$A$1:$A$4&",")),0))