<?php return [ [ 'A', 1, ], [ 'Z', 26, ], [ 'AA', 27, ], [ 'AB', 28, ], [ 'AZ', 52, ], [ 'BA', 53, ], [ 'BZ', 78, ], [ 'CA', 79, ], [ 'IV', 256, ], [ 'ZZ', 702, ], [ 'AAA', 703, ], [ 'BAA', 1379, ], ];