Write method public static Arraylisto ArrayList concatenate$($ArrayList a$,$ ArrayList b$)$

that concatenate one array list after another. For example, ifais $[$Dear$,$ Mr$..$ Adam, Smith$]$

and b is $[$wish$,$ you, happy New, Year$]$ then concatenatel$)$ returns the array list $[$Dear$,$ Mr$.$r Adam, Smith,

wish, you, happy, New, Year$]$

The elements of the array list should be entered by the user.

Sample Input

Enter element:

Dear

Enter $-1$ to stop or else to continue

Enter element:

Mr$.$

Enter $-1$ to stop or else to continue

Enter element:

Davis

Enter $-1$ to stop or else to continue

$-1$

Enter element:

Happy

Enter $-1$ to stop or else to continue

$2$

Enter element:

New

Enter $-1$ to stop or else to continue

Enter element:

Year

Enter $-1$ to stop or else to continue

Sample Output

$[$Dear$,$ Mr$.,$ Davis, Happy, New, Year$]$