| Clue | Source | Date |
|---|---|---|
| Lettered camera setting | ||
| Settings for camera lens apertures | ||
| Boston 123-Down | ||
| Boston subway station | ||
| Beantown metro station | ||
| Metro station, in Boston | LA Times Daily | 22 Jul 2020 |
| Metro station, in Boston | The Washington Post | 22 Jul 2020 |
| Metro station, in Boston | ||
| Braking method in skating that forms a letter shape | Jonesin | 30 Oct 2018 |
| Alternate camera lens aperture setting |