Answer:
二 NI, futa(tsu), futa - two
二 NI, futa(tsu), futa - two
二 NI, futa(tsu), futa - two
三 SAN, mi(tsu), mi(ttsu), mi - three
三 SAN, mi(tsu), mi(ttsu), mi - three
Add a single stroke to each of these to make another character.
三 SAN, mi(tsu), mi(ttsu), mi - three
工 KOU, KU - artisan, skill, work
コ Katakana "Ko"
ヨ Katakana "Yo"
王 OU - king