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.

Ex Input:
3, 11, ['B', 'V', 'S', '7211', 'U', '7773', '4803', 'z', '9371', 'l', 'S', '1559', 'l', '9203', '9919', 'M']

Ex Output:
Sl1739z30843777U1127S


Ex Input:
14, 18, ['685', 'F', 'O', 'A', '1179', '5015', '4467', 'O', 'q', 'i', '4613', 't', '5519', '411', 'J', 'U', 'O', 'u', '6281', '3915', 'u', '1883', 'h', 'Z', 'p', 'T', '9131', '2625']

Ex Output:
uOUJ114


Ex Input:
17, 23, ['7437', 'r', '5529', 'w', '3219', '1971', '2571', '4615', 'Q', '1611', 'E', 'M', 'g', '6463', 'C', 'j', '6083', 'd', '1773', 'z', '3129', '2419', '9905', 'Z']

Ex Output:

509991429213z3771d3806