Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_name_73 (month VARCHAR, _year VARCHAR, sunk_by_aircraft VARCHAR, sunk_by_warship_or_raider VARCHAR)
### Question:
What is the month and year less than 106005 were sunk by aircraft and 61857 were sunk by warship or raider?
### Answer:
SELECT month, _year FROM table_name_73 WHERE sunk_by_aircraft < 106005 AND sunk_by_warship_or_raider = 61857