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.
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Question: 2, 7, ['9969', 'u', '9811', 't', 'z', '8347', 'i', 'O', '5897']

Answer: i7438zt1189u


Question: 3, 10, ['s', '3299', 'K', 'D', '4621', '9075', 'K', '6987', 'S', '9829', 'm', 'I', '3797']

Answer: 9289S7896K57091264DK


Question: 3, 7, ['669', '9255', 'j', 'Y', '3765', 'U', '405', 'P', 'G', '2817', 'a', 'R', '6639', '2147', '3791', 'k', '3861', 'b', '4375', '1743']

Answer:
504U5673Yj