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: 13, 21, ['b', '437', 'z', '7025', '3285', 'j', 'a', '1699', '7029', '1153', 'B', '4735', 'j', 'e', 'c', '3615', 'm', '7447', '8361', '5567', '7585', '8109', '2613', '9911', 'W', 'o', '6073']

jec3615m7447836155677585