Vocabulary consisting only from characters you are able to read
種々
šudžu
variety; varietymix
験する
kensuru
to attempt, to test, to try outsuru
課題
kadai
subject/theme/task/challenge/issue/matter/(P)jlpt3, leda1
戦う
tatakau
to fight/to battle/to combat/to struggle against/to wage war/to engage in contest/(P)godan, sensou, verb, vintrans