Vocabulary consisting only from characters you are able to read
主な
omona
chief, main, principal, importantmix
海辺
umibe
beach, seashore; beach, seashoreryokou
笑い
warai
(1)laugh/laughter/ (2)smile/ (3)sneer/(P) jlpt3
必要(な)
hicujou(na)
(1)necessary/needed/essential/indispensable/(n) (2)necessity/need/requirement/(P) adj, leda1
勉める
cutomeru
to endeavor (endeavour), to try, to strive, to make an effort, to exert oneself, to be diligentichidan, verb, vtrans