コ Katakana "Ko"
ト Katakana "To" or The "Boku" radical - oracle
ナ Katakana "Na"
ニ Katakana "Ni" or NI, futa(tsu), futa - two
ハ Katakana "Ha" or HACHI, ya(ttsu), ya(tsu), ya, yo - eight
ロ Katakana "Ro" or KOU, kuchi - mouth
Arrange them like this:
ナナ
ロニ
ハ
トコ
暮 BO, ku(reru), ku(rasu) - grow dark, come to an end, live