Pls help me fix it

UnionIntersection.aia (4.6 KB)

What do we have to fix?
:thinking:

Any errors that you are facing?
Or stuck at coding some logic?

Inputs should be in the form of 1,2,3,4 (numbers separated by comma in textbox1 and textbox2)

UnionIntersection_1.aia (5.4 KB)