Definition: In this task, you are given inputs i,j, and A, where i and j are integers and A is a list. You need to concatenate all elements of A from the ith element to the jth element, and print the resultant string. i and j will be non-negative, and will always have a value less than the length of A. i will always be less than j.
Input: 2, 21, ['697', 'm', 'x', '4189', 'v', '6799', 'k', 'D', '5757', '553', 'd', 'X', '9573', '8683', 'm', '1319', '6711', 'M', 'z', 'Z', '7469', 'W', 'F']

mx4189v6799kD5757553dX95738683m13196711MzZ7469