Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_72 ( length__m_ INTEGER, country VARCHAR, maximum_grade___percentage_ VARCHAR, vertical_drop__m_ VARCHAR )

### Question ###
What is the shortest length of a track in Norway that has a maximum grade of 15% and a vertical drop less than 122.22 m?

### Accurate SQL ###

SELECT MIN(length__m_) FROM table_name_72 WHERE maximum_grade___percentage_ = "15" AND vertical_drop__m_ < 122.22 AND country = "norway"