instruction:
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.
question:
1, 15, ['o', '7861', '5335', '835', 'e', '8077', 'd', '3099', 'F', 'q', 'C', 'F', 'M', '4715', '2669', 'D', '1517', '4361', 'e', 'v', 'P', '6813', 'q', '9075', '9997', '8799', 'L']
answer:
96625174MFCqF9903d7708e53853351687o


question:
1, 3, ['9937', 'F', 'g', 'B', 'M', 'x', 'n', 'V', '4241', 'Z']
answer:
gF7399


question:
3, 18, ['4101', 'j', '3911', 'w', '927', '2935', '2295', '6743', 'K', '8451', '6363', 'J', '7265', 'F', 'u', '707', 'o', 'm', 'h', 'N', 'B', '2543', 'i', 'A', '3675', '3709', '4617']
answer:

mo707uF5627J36361548K347659225392729w1193