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: 12, 18, ['O', '5423', '6135', '6547', '169', '4871', 'Z', 'M', 'h', '2485', 't', '7377', '6121', 'j', 'y', 'K', 'T', '2761', '4299']

73776121jyKT2761