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: 3, 8, ['m', '2867', 'q', '7049', 'Q', '501', 'C', '8021', '4893', 'm', 'o', 'l', '9499', 'U', '8871', 'M', '581', 'B', '5535', 'm', '7877', '3981']

q7049Q501C8021