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, 19, ['K', 'N', 'v', 'K', 's', '2321', '6257', '9927', '7899', 'B', 'E', '2627', '1793', 'A', 'o', '755', '4843', 'Z', 'l', '4423', 'S', 'E', 'u']

26271793Ao7554843Zl