Vocabulary consisting only from characters you are able to read
苦労
くろう
troubles, hardshipssuru
手がかり
てがかり
(1)clue, key, trail, scent, track, contact, (2)handhold, on hand mix
共同
きょうどう
doing together (as equals), sharing, common (land, etc.), joint (statement, etc.), cooperation, co-operation, collaboration, associationsuru