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: 4, 18, ['7975', 'Z', '8173', 'k', 'u', 'p', 'R', 'q', 'j', 'F', 'R', '7685', '5573', '1447', 'k', '2863', 'x', '9543', 'b', '5233', 'P', '9819', '8601', '629', 'Q', 'u', 'b', '4769']

kupRqjFR768555731447k2863x9543