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.
4, 6, ['o', '3245', '121', '6879', '9917', '8691', 'b', 's', 'h', 'n', 'T', '3023', '7321', 'u', 'b', '3243', 'E', '3757', '7457', '4143', 'F', '4341', 'l']