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 Q]: 2, 2, ['9085', '5983', '3197', 'C']
[EX A]: 3895

[EX Q]: 2, 12, ['f', '1687', '819', 'N', 'w', '6089', '6725', 'p', '8625', '5327', 'r', '8103', 'd', '1441', 'v', 'k', '3407', '5891', 'X', '6419', 'e']
[EX A]: 3018r72355268p52769806wN9187861

[EX Q]: 7, 15, ['3147', 'C', 't', 'x', 'C', 'l', 'E', 'U', '2909', '1987', '7285', '2671', '8269', 'B', '6123', '783', 'P', 'Q', '7459', '5733', '5659', 'u', 'g', '8501', 'X', '2907', 'h', 'p']
[EX A]:
3216B96281762582778919092UE