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: 3, 3, ['5819', '3317', '451', '5811']

A: 154
****
Q: 3, 9, ['R', 'r', '7889', '4141', '1281', 'x', '9299', '4803', 'k', '2433']

A: k30849929x182114149887
****
Q: 2, 11, ['k', 'G', 'W', '8035', 'x', 'U', '8211', 'k', '9579', '7885', 'M', '8215', 'q', '817']

A:
M58879759k1128Ux5308WG
****