OK - But 'Enter Route in ICAO Flight Plan format' might be a simpler instruction. I do know what 'syntax' means, but I've never heard of it in the context of 'route syntax'.
Geek is a word in the new Oxford Dictionary.
Suntaxis are "Cor blimey, peeps is wha' cousin Stavros drive tourists round Asbestos, Domestos, Argos and Pathos in, innit' mate"! Syntaxis - or even better, Sin taxis, sound much more fun.
Shall now invent an imaginary 'square' route which will generate a NOTAM summary for my local area and save it as a 'favourite'.
Danke!