Compare two columns with delimiters and find the difference

[Timetolearn]

I am new to Alteryx and would really appreciate the help

My input next is as below. I need to subtract the text of Column B from Column A and give the output as the difference 

ID	A	B
8521	B1,B2,B3,C1A,C1B,C2,C3,D1,D2,D3,J3,J4,J5,J6,J7,J8,J9,JA,JB,B4,C4,D4,G4,K3,K4,K5,G1,G2,G3A,G3B	A1,A2,A3,B1,B2,B3,C1A,C1B,C2,C3,D1,D2,D3,J0,J1,J2,J3,J4,J5,J6,J7,J8,J9,JA,JB,A4A,A4B,B4,C4,D4,G4,K3,K4,K5,G1,G2,G3A,G3B
8535	B1,B2,B3,C1A,C1B,C2,C3,D1,D2,D3,J3,J4,J5,J6,J7,J8,J9,JA,JB,B4,C4,D4,G4,K3,K4,K5,G1,G2,G3A,G3B	A1,A2,A3,B1,B2,B3,C1A,C1B,C2,C3,D1,D2,D3,J0,J1,J2,J3,J4,J5,J6,J7,J8,J9,JA,JB,A4A,A4B,B4,C4,D4,G4,K3,K4,K5,G1,G2,G3A,G3B

[DataNath · Accepted solution]

Hey @Timetolearn, here's one way I'd look at doing this. The steps can basically be described as follows:

1) We split fields A and B into rows, each time a comma occurs. This creates one row per ID per value.

2) We then conduct a join on ID = ID and A = B.

- Where A != B, this means there is no match found within that ID and is hence a difference

3) These non-matches fall out of the L and R output anchor of the Join tool which represents the left/right side of the join.

4) We then sort and concatenate the values that fall out of said anchors, in order to get a list of the differences between the 2 original fields.

Hope this helps! Workflow attached.