| ```python | |
| mapping = { | |
| "extension cord": "unknown", | |
| "extension cords": "unknown", | |
| "extension usb risers": "unknown", | |
| "external blower fan": "unknown", | |
| "external buck converter board": "unknown", | |
| "external fan": "unknown", | |
| "external hub": "unknown", | |
| "external monitor": "unknown", | |
| "external pi": "unknown", | |
| "external power supply": "unknown", | |
| "external powered belkin usb hub": "unknown", | |
| "external turbo blow fan": "unknown", | |
| "external wired fuse holder": "unknown", | |
| "extra chips": "unknown", | |
| "extra fan": "unknown", | |
| "extra fans": "unknown", | |
| "extra little fans": "unknown", | |
| "extra module": "unknown", | |
| "extra's": "unknown", | |
| "extraordinaire rig": "unknown", | |
| "extreme 2th/s bitcoin miner": "unknown", | |
| "eyboot hub 49 ports": "unknown", | |
| "eyeboot usb mini 2-port usb 2.0 hub splitter": "unknown", | |
| "f1 fuse": "unknown", | |
| "f5": "unknown", | |
| "f9 3pin model fan": "unknown", | |
| "factory seconds": "unknown", | |
| "fake machine": "unknown", | |
| "fake-avalon": "unknown", # Closest match could be any "Avalon" miner, but no exact match. | |
| "falcon": "unknown", | |
| "fan": "unknown", | |
| "fan 1": "unknown", | |
| "fan 2": "unknown", | |
| "fan 74y5220 qfr1212ghe 12038 12v 2.7a 12cm original and new": "unknown", | |
| "fan adapter": "unknown", | |
| "fan and heatsink": "unknown", | |
| "fan bearing": "unknown", | |
| "fan bearing cover": "unknown", | |
| "fan blades": "unknown", | |
| "fan cable": "unknown", | |
| "fan cables": "unknown", | |
| "fan connector": "unknown", | |
| "fan control": "unknown", | |
| "fan controller": "unknown", | |
| "fan controllers": "unknown", | |
| "fan cooled miners": "unknown", | |
| "fan delta delta 120 mm 12 cm pwm fan tfc1212de 252cfm": "unknown", | |
| "fan header": "unknown", | |
| "fan mount plate": "unknown", | |
| "fan pins": "unknown", | |
| } | |
| ``` |