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 find all elements of A from the ith element to the jth element, reverse the order in which they occur, and then concatenate them to output 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. Perform the operations in order, i.e., do not concatenate the elements and then reverse the string.
Input: 1, 18, ['9637', 'y', 'u', 'z', 'g', '4787', 'G', '3037', '5309', '5617', '4465', 'o', '2965', '2341', '1299', 'x', '7361', 'C', '3999', 'z', '8869', '9875', '9799']

C7361x129923412965o4465561753093037G4787gzuy9637