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: 1, 2, ['t', '1143', '4747', 'E', 'v', 'L', '451', '7367', 'O', 'T']

SOLUTION: 3411t

PROBLEM: 2, 12, ['p', 'o', '2673', 'd', 'r', 'n', 'Z', 'u', 'm', '5195', '6521', '7671']

SOLUTION: 176712565915muZnrd3762o

PROBLEM: 6, 24, ['t', 'W', 'M', 't', '8217', '9217', 'c', '2015', 'e', 'Q', '9045', '3767', 'U', '4105', 'R', 'p', '1631', '6133', 'B', 'i', '3363', '3947', '211', '9369', '3261', '9007', 'G', 'a', '2223', 'k']

SOLUTION:
963911274933633iB33161361pR5014U76735409Qe5102c7129