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, 21, ['6761', 'f', 's', 'x', 'K', 'O', '8789', 'F', '4195', 'h', 'G', 'o', '4061', 'a', 'X', '9603', 'o', '927', '7417', 'o', '447', '8901', '4343', 'O', 'c', '951', 'y', 'f', 'r', 'l']