TASK DEFINITION: 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.
PROBLEM: 4, 12, ['I', 'G', 'u', 'S', '9615', 't', 'p', 'P', 'R', 'v', '8819', '5379', 'I', '1165', '4545', '3117', '1577', 'y', 'W', 'R', 'O']

SOLUTION: 97359188vRPpt5169S

PROBLEM: 7, 10, ['4843', 'p', 'I', '8757', '2967', '7461', 'c', '2639', 'p', '8895']

SOLUTION: 5988p9362c

PROBLEM: 6, 15, ['3499', '6897', 'B', 'e', '3673', 'A', 'd', '3949', 'k', '9493', '557', 'Z', '7101', 'e', 'I', '679', 'u', 'x', '915', 'z', 'N', 'a', '7789', 'O', 'R', 'J']

SOLUTION:
Ie1017Z7553949k9493dA