7ak1 6ak18y 5ak18 4ak1 3ak18y
ikj18y hkj18 gkj1 fkj18y ekj18
tti18 sti1 rti18y qti18 pti1
42h1 32h18y 22h18 12h1 02h18y
fch18y ech18 dch1 cch18y bch18