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]: 1, 3, ['6017', 'o', '1817', 'W']
[EX A]: 7181o7106

[EX Q]: 20, 26, ['9693', 'i', '8753', 'f', '9131', 'v', '2831', '1541', 's', '8307', '373', 's', 'z', '4929', 'I', '741', 'K', '7767', '2557', 'f', '887', 'g', '779', 'k', '5967', '4947', '2373', '7251', '8841', '3277']
[EX A]: 74947695k977g788f

[EX Q]: 18, 28, ['5195', 't', 'H', '1111', '9819', '5713', 't', 't', '5773', '8459', '673', '6787', 'R', 'q', 'n', 'p', '5055', '893', 'f', '8847', 'q', 'V', '8697', '8139', '5173', 'm', 'o', '9695', 'h']
[EX A]:
5969om371593187968Vq7488f398