CREATE TABLE table_name_68 (masculine_u_stems VARCHAR, neuter_a_stems VARCHAR)

What is the masculine u form for the old Swedish word with a neuter a form of skipum?
SELECT masculine_u_stems FROM table_name_68 WHERE neuter_a_stems = "skipum"
SELECT "masculine_u_stems" FROM "table_name_68" WHERE "neuter_a_stems" = "skipum"