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F. Interesting Function

time limit per test

2 secondsmemory limit per test

256 megabytesinput

standard inputoutput

standard outputYou are given two integers $$$l$$$ and $$$r$$$, where $$$l < r$$$. We will add $$$1$$$ to $$$l$$$ until the result is equal to $$$r$$$. Thus, there will be exactly $$$r-l$$$ additions performed. For each such addition, let's look at the number of digits that will be changed after it.

For example:

- if $$$l=909$$$, then adding one will result in $$$910$$$ and $$$2$$$ digits will be changed;
- if you add one to $$$l=9$$$, the result will be $$$10$$$ and $$$2$$$ digits will also be changed;
- if you add one to $$$l=489999$$$, the result will be $$$490000$$$ and $$$5$$$ digits will be changed.

Changed digits always form a suffix of the result written in the decimal system.

Output the total number of changed digits, if you want to get $$$r$$$ from $$$l$$$, adding $$$1$$$ each time.

Input

The first line contains an integer $$$t$$$ ($$$1 \le t \le 10^4$$$). Then $$$t$$$ test cases follow.

Each test case is characterized by two integers $$$l$$$ and $$$r$$$ ($$$1 \le l < r \le 10^9$$$).

Output

For each test case, calculate the total number of changed digits if you want to get $$$r$$$ from $$$l$$$, adding one each time.

Example

Input

4 1 9 9 10 10 20 1 1000000000

Output

8 2 11 1111111110

Codeforces (c) Copyright 2010-2021 Mike Mirzayanov

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