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: 5, 9, ['f', 's', '7931', 't', '8647', '9357', '8123', '2845', '7925', '1407', '9823', '1121', '6239', '9255', '1575', 'E', 'x', '761']

86479357812328457925