Programmatically get list of adjacent blocks from US Census Data [closed]

I am currently doing a research project right now where I am looking at US Census Data. I am looking at data at the Census Block level and would like to pull a list of adjacent blocks. And by "adjacent blocks", I mean a pair of blocks that touch or share an edge.

Is there any way that I could do this programmatically? Before I was just looking at the maps and writing down all the different pairs that look like they touch.

And I have access to ArcGIS 10.2, Google Earth Pro, and any free software.