Three players are playing a game of word composition in which each player writes down a list of words. After the time expires the scores are calculated using the following rules. Each player gains 3 points for each unique word that only he has, 2 points for each word that is shared with exactly one other player, and 1 point for each word that is shared with both of the other players.
You will be given Strings listA, listB and listC - the word lists of playerA, playerB and playerC respectively. Your method should return scores of playerA, playerB and playerC in the form "scoreA/scoreB/scoreC" (quotes for clarity).