Solve the programming task below in a Python markdown code block.
Chef has closed his restaurant and decided to run a fruit stand instead. His signature dish is a fruit chaat consisting of 2 bananas and 1 apple. He currently has X bananas and Y apples. How many chaats can he make with the fruits he currently has? 

------ Input Format ------ 

- The first line will contain T, the number of testcases. Then the testcases follow.
- Each testcase consists of a single line containing two space separated integers - X and Y

------ Output Format ------ 

For each testcase, output the answer on a new line. 

------ Constraints ------ 

$1 ≤ T ≤ 100$
$0 ≤ X, Y ≤ 100$

----- Sample Input 1 ------ 
3
72 50
38 93
51 4
----- Sample Output 1 ------ 
36
19
4

----- explanation 1 ------ 
Test Case $1$: Chef can make $36$ chaats using $72$ bananas and $36$ apples.

Test Case $2$: Chef can make $19$ chaats using $38$ bananas and $19$ apples.

Test Case $3$: Chef can make $4$ chaats using $8$ bananas and $4$ apples.