After a bit of experimentation it appears 3 letter words are NOT indexed. This may well be for Space or Speed considerations however missing out some 3 letter words would be rather poor. Eg EON, CAT, BBC, TAX .
I did some door to door charity collection once. 95 of people give nothing without any apparent concern. The rest are amazingly generous and give loads. If I were the Charity collectors I would make a note of the generous ones and only call there.
Feet on seats. People with tiny cars who leave enough space for a tank around them. People who don't know what day it is and are supposed to be in charge.
THe bus may well be being driver back to depot for 1 of two reason. Driver has finished shift. Or it is starting on another route. Maybe if drivers were allowed to keep the fares if they stop when going off shift they wouldn't mind get home a bit later.