The terms from the mantra 'sarvalok' could it be for being chanted as how it is or as sarva loka,having an a AND 'Vashkari' could it be to become chanted as it is or as vashikari,by having an i between. There are plenty of purpose why your adore one particular https://www.youtube.com/watch?v=qnEcMQtKTvg