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.
10, 29, ['6903', '759', 't', 'm', '1037', 't', '7731', 'R', 'A', '2355', 'z', '4893', 'F', 'x', '5699', '969', 'U', 'y', 'X', '2803', 'x', 'R', 'B', '1127', 'G', 'V', '2229', 'U', '4423', '4345']