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: 18, 25, ['O', '4279', '1809', 't', '4643', 'k', '2773', 'b', 'R', 'n', 'S', '7527', 'V', 'C', 'P', 'R', '9779', 'K', 'Z', 's', 'L', '1351', 'u', '6253', '6767', '2103', 'V', '6561', 'O', '6481']

KZsL1351u62536767