Solve the programming task below in a Python markdown code block.
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Chef has bought a new robot, which will be used for delivering dishes to his customers. He started testing the robot by letting it move on a line.

Initially, the robot is placed at the coordinate $x = X$. Then, it should execute a sequence of $N$ commands, described by a string $S$ with length $N$. Each character of this string is either 'L' or 'R', denoting that the robot should walk one step to the left (decreasing $x$ by $1$) or to the right (increasing $x$ by $1$), respectively.

How many distinct points are visited by the robot when it has executed all the commands? A point $p$ is visited by the robot if $p$ is an integer and the robot's position before or after executing some command is $x = p$.

------  Input ------
The first line of the input contains a single integer $T$ denoting the number of test cases. The description of $T$ test cases follows.
The first line of each test case contains two space-separated integers $N$ and $X$.
The second line contains a single string $S$ with length $N$.

------  Output ------
For each test case, print a single line containing one integer ― the number of points visited by the robot.

------  Constraints  ------
$1 ≤ T ≤ 100$
$1 ≤ N ≤ 100$
$|X| ≤ 1,000,000$
$S$ contains only characters 'L' and 'R'

------  Subtasks ------
Subtask #1 (100 points): original constraints

----- Sample Input 1 ------ 
2

6 10

RRLLLL

2 0

LL
----- Sample Output 1 ------ 
5

3
----- explanation 1 ------ 
Example case 1: The robot followed the path $10 \rightarrow 11 \rightarrow 12 \rightarrow 11 \rightarrow 10 \rightarrow 9 \rightarrow 8$.

Example case 2: The robot followed the path $0 \rightarrow -1 \rightarrow -2$.