Here is an example of two number sets I'm using in cells A1:J1 and
A2:J2

4 6 9 15 16 20 21 27 28 29

5 7 9 13 16 21 27 27 31
37

Sometime's my number sets won't have any matching numbers, sometimes
all 10 will match. I would like to copy any of the numbers in set two
that match any of the numbers in set one into cells L2:U2 without
duplicates (27 in this example).

For this example I would end up with 9 16 21 27 in cells L2:O2
P2:U2 would be left blank (no zero in cell).