Vocabulary consisting only from characters you are able to read
回る
mawaru
(1)to turn/to revolve/ (2)to visit several places/ (3)to function well/ (4)to pass a certain time/(P) godan, verb, vintrans
換わる
kawaru
(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
後
ato
afterwards, since then, in the futurejlpt5, toki