CREATE TABLE table_203_555 (id DECIMAL, "place" TEXT, "player" TEXT, "country" TEXT, "score" TEXT, "to par" DECIMAL, "money  ( $ ) " DECIMAL)

how many strokes was isao aoki behind larry nelson ?
SELECT (SELECT "to par" FROM table_203_555 WHERE "player" = 'isao aoki') - (SELECT "to par" FROM table_203_555 WHERE "player" = 'larry nelson')
SELECT (SELECT "to par" FROM "table_203_555" WHERE "player" = 'isao aoki') - (SELECT "to par" FROM "table_203_555" WHERE "player" = 'larry nelson')