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.

18, 20, ['5263', '7963', '8931', 'I', 'n', '8167', 'A', '5429', 'O', '6539', '7303', 'V', 'l', 'd', 's', '8377', 'Z', '7345', 'X', 'D', '6125', 'c', 'o', 'x', 'I', '2807', '3995', '3297', 'O']
DX5437

2, 7, ['9969', 'u', '9811', 't', 'z', '8347', 'i', 'O', '5897']
i7438zt1189u

6, 16, ['T', '7203', 'J', 'O', 'h', 'm', 'q', '3985', 'H', 'w', '2055', '9161', 'T', '8415', '95', 'c']

c595148T16195502wH5893qm