Function description

Complete the firstOccurence function provided in the editor. This function takes the following $2$ parameters and returns the answer:

A: Represents the first string

B$.$ Represents the second string

Input format

Note: This is the input format that you must use to provide custom input $($available above the Compile and Test button$).$

The first line contains an integer $T$ denoting ${?}^{\text{I}}$ the number of test cases. $T$ also denotes the number of times you have to run the firstOccurence function on a different set of inputs.

For each test case:

The first line contains a string A consists of lowercase English letters.

The second line contains a string $B$ of consists of lowercase English letters.

Output format

For each test case, print the answer in a new line.

&Previous Question

Next Question $>$