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:
3, 12, ['2159', 'f', 'u', '2675', '7357', '9325', '1275', '8897', 'I', '2095', '5835', '577', 'g', '2783', '7843', '8517', '4185', '5847', '2645', '2357', 'l', 'v', '2239', '141', 'o', '2529', '7977', '8445', '2363']
answer:
77553855902I79885721523975375762u


question:
3, 10, ['g', '5155', 'p', '6627', 'W', 'q', '2851', 'm', 's', '7781', 'u', '9739']
answer:
1877sm1582qW7266p


question:
1, 2, ['N', '6385', '1071', 'P', '1213', '7035', '7201', 'c', 'z', '4223', '9739', '9253', '1555', 'l', '3537', '1701', 'R', '2787', '4837', 'c', '103', '387', '3335', '8011', '7895', '1379', 'd', 'T', 'R', 'u']
answer:

5836N