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.
1, 21, ['O', 'R', '1637', 'P', 'h', 'w', 'x', 'i', '7521', '7201', 'j', '1995', '2407', 'o', '5895', '1835', 'a', 'L', '4257', '6667', 'M', 't', 'V', '7443', '1015', 'Q', '7249', '5521', 'w', '5267']