List the internatinal Q-Days and D-Days
|9-18||5 quietest days [1q2q3q4q5q] (5I2)|
|20-29||The latter half of 10 quietest days [6q7q8q9q0q] (5I2)|
|31-40||5 most disturbed days [1d2d3d4d5d] (5I2)|
Q-Days and D-days are selected in each month and numbered by the sequece of the degree of quietness and disturbance as 1q, 2q, 3q, 4q, 5q, 6q, 7q, 8q, 9q and 0q, and 1d, 2d, 3d, 4d and 5d, respectively.