human
Considering the provided database schema and associated query, produce SQL code to retrieve the answer to the query. 
###Database Schema: Masculine a-stems, Masculine u-stems, Feminine ō-stems, Neuter a-stems, Masculine an-stems, Feminine ōn-stems
###Question: What is the masculine an form for the word with a feminine ö ending of siangar and a masculine u ending of sunar?
gpt
SELECT Masculine an-stems FROM table WHERE Feminine ō-stems = siangar AND Masculine u-stems = sunar