Vocabulary consisting only from characters you are able to read
代
よ
(1)substitution, (2)material, (3)price, (4)margin (e.g. for stapling, etc.), area required for something, (5)(arch) shiro (unit of land area equal to one-fiftieth of a tan; ~19.83 m.sq.); (6)cha mix
替わる
かわる
(1)to succeed, to relieve, to replace, (2)to take the place of, to substitute for, to take over for, to represent, (3)to be exchanged, to change (places with), to switch godan, jlpt3, verb, vintrans, vtrans
後
あと
afterwards, since then, in the futurejlpt5, toki