Vocabulary consisting only from characters you are able to read
中世
ちゅうせい
Middle Ages, mediaeval timestoki
僕
ぼく
I (used by men with close acquaintances)jlpt4
赤字
あかじ
(1)deficit, (being in or going into) the red, (2)red text, red letters, (3)corrections (by a teacher or proofreader) written in red mix