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, 17, ['8461', 'W', '5779', '7069', '649', 'x', '5735', '6455', '6957', 'u', 'q', '1029', '7077', 'z', '5559', 'g', '4637', '6775', 'U', 'a']

x573564556957uq10297077z5559g4637