CREATE TABLE table_51856 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Venue" TEXT, "Crowd" FLOAT, "Date" TEXT)

What is the home team score when the away team score is 17.18 (120)?
SELECT "Home team score" FROM table_51856 WHERE "Away team score" = '17.18 (120)'
SELECT "Home team score" FROM "table_51856" WHERE "Away team score" = '17.18 (120)'