SELECT MIN(length__m_) FROM table_name_72 WHERE maximum_grade___percentage_ = "15" AND vertical_drop__m_ < 122.22 AND country = "norway"
Berapa panjang trek terpendek di Norwegia yang memiliki nilai maksimum 15% dan penurunan vertikal kurang dari 122,22 m?
CREATE TABLE table_name_72 (length__m_ INTEGER, country VARCHAR, maximum_grade___percentage_ VARCHAR, vertical_drop__m_ VARCHAR)