Example:
EB1234567R987654
EB7654321R987654
The two into a set of (even)
EB1234567R456789
This is a group (odd)
EB1234567R456780
EB1234567R456780
EB1234567R456780
(odd)

A local name for sn excel table N group more than Numbers; Using scanning gun scan any one group, and prompt the number is (odd/even)