CREATE TABLE table_name_63 (roll INTEGER, decile VARCHAR(255), area VARCHAR(255), name VARCHAR(255))
What is the roll number of Orautoha school in Raetihi, which has a decile smaller than 8?
    
SQL: SELECT SUM(roll) FROM table_name_63 WHERE area = "raetihi" AND name = "orautoha school" AND decile < 8