## Problem

The working hours of Chef’s kitchen are from  pm to  pm (1≤�<�≤12).

Find the number of hours Chef works.

### Input Format

• The first line of input will contain a single integer , denoting the number of test cases.
• Each test case consists of two space-separated integers  and  — the starting and ending time of working hours respectively.

### Output Format

For each test case, output on a new line, the number of hours Chef works.

• 1≤�≤100
• 1≤�<�≤12

### Sample 1:

Input

Output

4
1 2
3 7
9 11
2 10

1
4
2
8


### Explanation:

Test case 1: Chef starts working at 1 pm and works till 2 pm. Thus, he works for 1 hour.

Test case 2: Chef starts working at 3 pm and works till 7 pm. Thus, he works for 4 hours.

Test case 3: Chef starts working at 9 pm and works till 11 pm. Thus, he works for 2 hours.

Test case 4: Chef starts working at 2 pm and works till 10 pm. Thus, he works for 8 hours.

## Code Examples

### #1 Code Example with C Programming

Code - C Programming

#include<stdio.h>

int main(void) {
int t,start,end;
scanf("%d",&t);
while(t--)
{
scanf("%d %d",&start,&end);
printf("%d\n",end-start);
}
return 0;
} 
Copy The Code &

Input

cmd
4
1 2
3 7
9 11
2 10

Output

cmd
1
4
2
8
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## Demonstration

CodeChef solution KITCHENTIME  - Kitchen Timings Codechef solution in C, C++