PMI and LEPA are the IATA and ICAO designators, respectively, for the Son San Juan airport in Palma de Mallorca. Similarly MME and EGNV are the designators for Teeside airport.
Are TEE and PLM part of some third designator system or are they simply pilots’ shorthand? Just interested as a wannabe: don’t kill me for asking.
Incidentally, PLM is the IATA designator for the Sultan Mahmud Badaruddin Ii airport in Palembang, Indonesia whilst TEE is the IATA designator for Tbessa airport, Algeria.