In this task, you are given inputs 'i', 'j', and A, where 'i' and 'j' are integers and A is a list. A list is shown by two brackets and comma-separated numbers and characters inside, like ['1', '12', 'l']. You need to concatenate all elements of A from the ith element to the jth element, and then reverse the resulting 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 reverse first and then concatenate.
12, 15, ['M', 'k', 'E', 'w', 'D', 'g', 'Z', '1999', 'q', 'y', '7047', 'v', 'z', 'o', '6535', '2099', 'X', '773', '1139', 'f', '423', 'G', 'M', 'R', '1875', '1051', 'h', '9301', '7485']