Bean+Passing+Chart

Question: What is the most efficient method to pass a bean between 2 people?

Hypothesis: If I test different finger combinations while passing a bean, then UR1-UR2 will be the most efficient method because having opposable thumbs help humans use resources in everyday life properly and much more easily.

Data Analysis: media type="custom" key="11365828"

DSET: My claim is that UR1-UR4 is the best phalange combination for bean passing because