'guess when' function guesses which visit, based on surrounding check-ins

[tevpg]

We use a phone number sheet where people write down tag numbers (without the colour codes). Would like to be able to get better insight into which phone number corresponds to a given visit (presumably a bike that is in danger of being leftover). Given bikes on either side in the sheet, (which may not be all the check-ins because not everyone writes down their number), try to determine which tagid and visit is indicated.

NB much of this can be done with 'recent' -- though let's imagine other commands:

'guess'

: guess wa4 bf6 wa9
bf6 is likely visit #2 that started at 11:37
(then the list of bf6 visits)

'near'

I like this one better. Easier to use and easier to implement

: near bf6
Tag bf6 used 2 times. These are check-ins near its check-ins.

9:06 WA1
9:08 BF3
9:30 WA4
9:40 BF6 ****
10:00 BF8
10:00 WA8

9:06 BG8
9:08 WE5
9:30 BH7
9:40 BF6 ****
10:00 BF0
10:00 WD4