It can be blank.
Note: Minify the command to avoid issues :)
omg sword
potion of godness
My slimy red cool head
ultra deadly potion
HOTEL ONLY ONE COMMAND BLOCK
"Herobrine joined the game."
make houses!
BIG TNT BLOCK!
soulshadow_x
soulshadow_x
emiliusamigos10
beargryllsgamer
callumgraham
lolgamer1200