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: 9, 21, ['E', '4309', 'm', '8029', '8745', '5847', '3493', '2071', 'f', '105', 'c', 'Z', '1809', 'c', '2559', 'C', '2885', '2455', 'X', 'Q', '6759', 'w', 'K', 'E']

f105cZ1809c2559C28852455XQ6759