CREATE TABLE table_203_654 (id DECIMAL, "position" DECIMAL, "team" TEXT, "points" DECIMAL, "played" DECIMAL, "won" DECIMAL, "drawn" DECIMAL, "lost" DECIMAL, "for" DECIMAL, "against" DECIMAL, "difference" DECIMAL)

which team was the only team that was undefeated ?
SELECT "team" FROM table_203_654 WHERE "lost" = 0
SELECT "team" FROM "table_203_654" WHERE "lost" = 0