CREATE TABLE table_42751 ("Inf. Stem" TEXT, "Sing. Pres." TEXT, "Plur. Pres." TEXT, "Sing. Pret." TEXT, "Plur. Pret." TEXT, "Subj. Pres." TEXT, "Subj. Pret." TEXT, "Past Part." TEXT)

What is the singular present that is associated with a singular preterite of ou and a subjunctive present of ie?
SELECT "Sing. Pres." FROM table_42751 WHERE "Sing. Pret." = 'ou' AND "Subj. Pres." = 'ie'
SELECT "Sing. Pres." FROM "table_42751" WHERE "Sing. Pret." = 'ou' AND "Subj. Pres." = 'ie'