Answer:
コ+十+二 コ+十+二 Katakana "Ko" / JUU, tou, to - ten / Katakana "Ni"
合 GOU, GA, a(u) - meet
官 KAN - government, authorities
弟 DAI, TEI, otouto - younger brother
即 SOKU - immediately, conform
Add 竹 (CHIKU, take - bamboo) and watch new kanji shoot out from them!
筆 HITSU, fude - writing brush
答 TOU, kotae(ru) - answer
管 KAN, kuda - pipe, control
第 DAI - degree, ordinal
節 SETSU, SECHI, fushi - season, verse, joint, melody