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, 13, ['497', 'v', '7469', 'c', '8913', '533', 'P', '3051', '2237', 'R', '9609', 'J', 'R', 'x', '5787', '2203', '5943', '6847', '8989', 'A', '5227', 'O', 'M', 'n', '4993']

SOLUTION: RJ9069R73221503P3353198c9647v794

PROBLEM: 12, 13, ['w', '2825', '7553', '5565', '4973', '1763', '4755', 'c', 'y', '6241', '7527', '7701', '865']

SOLUTION: 5681077

PROBLEM: 6, 11, ['5981', 'i', 'o', '6775', 'x', '1943', 'X', 'R', '3211', 'E', 'p', 'k', 'c', '2943', 'Z', '2485', 'j', 'I', '9013', '3321', 'j', '8009', '9743']

SOLUTION:
pE1123RX3491