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.

[EX Q]: 3, 6, ['A', '6949', '2045', '119', '1373', '9613']
[EX A]: 316937319115402

[EX Q]: 3, 4, ['2419', '643', '8177', '7291', '561', '6529', '4101', 'u', '6445']
[EX A]: 19277718

[EX Q]: 8, 9, ['s', 'F', 's', '8153', 'C', 'p', 'x', '3613', '3603', 'W', 'n']
[EX A]:
30633163