The Floor is lava - Proximity edition

In this game quiz your task is to get on all the black stones without falling on the lava. To do so start by typing on A1 then move to the nearest stone. You may not go on a stone twice. Once you land on all the stones the quiz ends. To go onto a stone, type its coordinate. Oh and you only have 45 seconds If you land on lava, or a stone that is not the closest the quiz ends