human
Considering the provided database schema and associated query, produce SQL code to retrieve the answer to the query. 
###Database Schema: Letter, Pronunciation spelled free, Pronunciation spelled checked, Example spelled free, Example spelled checked
###Question: What is Letter, when Example Spelled Checked is "tin /tɪn/ ("tin")"?
gpt
SELECT Letter FROM table WHERE Example spelled checked = tin /tɪn/ ("tin")