CREATE TABLE table_204_77 (id DECIMAL, "number" TEXT, "builder" TEXT, "type" TEXT, "date" TEXT, "works number" DECIMAL, "notes" TEXT)

what is the number of the only diesel locomotive from edwards rail car company ?
SELECT "number" FROM table_204_77 WHERE "builder" = 'edwards rail car company'
SELECT "number" FROM "table_204_77" WHERE "builder" = 'edwards rail car company'