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:
2, 7, ['9969', 'u', '9811', 't', 'z', '8347', 'i', 'O', '5897']
answer:
i7438zt1189u


question:
6, 7, ['J', '701', 'm', '8837', 'b', 'd', '5911', 'y', '8031']
answer:
1195d


question:
2, 7, ['7163', '9603', 'w', 'd', '8121', '6317', 'p', '2015', 'u', '4995', 'E', 's', '9341', '6661', '4105', 'E', 'M', 'q', '6035']
answer:

p71361218dw3069