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, ['3303', '6127']

SOLUTION: 72163033

PROBLEM: 1, 3, ['7635', 'c', 'h', 'D', 'K', '7235', 'e']

SOLUTION: hc5367

PROBLEM: 10, 12, ['m', '9929', '3489', 'A', 'F', 't', 'y', 'i', 'h', '4861', '1257', 'M', '3099']

SOLUTION:
M75211684