A new mathematical language (let's call it Ninja) is discovered, in which 8 is completely missing.
So, new counting becomes \(\left( 1,2,3,4,5,6,7,9,10,...\right)\). Whole counting is written without 8.
For example, \(29\) comes after \(27, 90\) comes after \(79\), etc.
Thus \(27+1 = 29\), \(79+1 = 90\).
Now, your task is to perform addition, subtraction, multiplication and division operations on two numbers in this new language Ninja.
NOTE : The final output also has to be in the language Ninja.

Input Format
The first line contains an integer, T, denoting the number of test cases.
For each test case, two integers a and b are given, separated with any one of the above operation \((+,-,*,/)\).
It is guaranteed that answer will not be negative.
For division operation, you have to answer integer division.

Output Format
For each test case, print the output of operation in Ninja.

Constraints

• \(1 \leq T \leq 10^{5} \)
• \(0 \leq a,b \leq 10^{9} \)( a and b are in Ninja language )
• \(b \neq 0\) for division(\(/\)) operation
• \(a \geq b\) for subtract(\(-\)) operation