When you're so freaking bored that you type letters diagonally on each end of the letters on the keyboard but skip over the comma/less than sign key. You have most likely tried qwertyuiopasdfghjklzxcvbnm and qazwsxedcrfvtgbyhnujmikolp.
You were supposed to be doing your homework on your computer, but got bored and typed qazplm in the search bar and pressed enter.