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, 12, ['9797', 'D', '41', 'Y', 's', 'u', 'X', 'Q', '2437', '7385', '7137', 'S', '6367', 'w', 'f', '7021', '7685', '7413']
[EX A]: S731758377342QXusY14D

[EX Q]: 2, 22, ['43', 'V', '469', '8463', 'E', 'J', 'N', '4049', 'f', '8529', 'R', 'P', 't', '6217', 'v', '8311', 'R', '2055', 'g', '6011', '2567', 'O', 'r', 'K', '8757', 'l', '9205', 'k', '6959']
[EX A]: O76521106g5502R1138v7126tPR9258f9404NJE3648964V

[EX Q]: 12, 12, ['v', 'H', '2751', 'j', 'V', '7137', 'o', '195', '3273', '9601', '1601', '7533', 'F', 'K', '6571', '6441', '4467', 'n', '9321', '9829', '995', '5805', '223', '8101', 'Q', '5923', 'q']
[EX A]:
3357