P17733 [ICPC 2019 Xuzhou R] <3 numbers

Rosie likes to play with positive integers, especially the

The first line has a positive integer of $T$, which represents the total number of test data. Each test data is a line of two integers $L, R$. - $1 \le T \le 100$ - $1 \le L \le R \le 10^9$

Please output one line for each test data. If the proportion of