mdadm: layout for raid10 must be 'nNN', 'oNN', or 'fNN' where NN is a number, not n2f2(or whatever syntax I tried)

sudo mdadm --verbose --create /dev/md127 --level=10 --layout="What should go here to create an array using near=2 & far=2 layouts?" --chunks=512 --raid-devices=5 /dev/sd[b-f]1