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: 6, 15, ['u', '5099', 'P', '8617', '3125', 'z', '5667', 'y', '2163', '5671', 'L', '2873', '8513', 'M', 'Z', '1609', 'l', '3381', '9379', '9799', '7513']

z5667y21635671L28738513MZ