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.

[Q]: 1, 12, ['f', '8665', '6205', 'L', 'y', 'P', '9351', 'k', '1387', '657', 's', 'k']
[A]: ks7567831k1539PyL50265668f


[Q]: 3, 6, ['p', 'H', '2775', '2567', '7787', 'D', '3807', '4817', '5399']
[A]: D787776525772


[Q]: 6, 10, ['6659', '6909', '4013', 'X', '6851', '15', 'P', 'y', '2141', 'o']
[A]:
o1412yP51