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.

Q: 2, 3, ['6875', 'D', 'r']

A: rD
****
Q: 7, 10, ['417', '8131', '7239', '9699', 'z', 'H', 'P', '9349', '4835', '3217', '9899']

A: 712353849439P
****
Q: 13, 19, ['3767', 'A', 'c', 'S', 'T', 'z', '2479', '2781', 'Y', 'N', 'z', 'm', '5779', 'M', 'M', '4903', 'M', '2369', '1721', 'S', 'b']

A:
12719632M3094MM9775
****