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:
14, 19, ['2487', 'z', '4131', 'I', 'k', 'o', 'T', '5069', '2815', 'b', '1097', 'E', '3231', 'k', '7187', '717', '3039', 'm', 'X', 'M', '9547', '2727', 'L', '8193', '3519', '3619']
answer:
Xm93037177817k


question:
2, 5, ['6345', '7381', 'm', '5685', '3267', '9841', '9719', 'N', 'e', '1455', 'i', '3989', '3285', '9257', 'u', '8547', '1799']
answer:
76235865m1837


question:
1, 7, ['O', '1159', '8219', 'B', '5683', '3173', '8469']
answer:

964837133865B91289511O