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, 7, ['B', '707', '7101', 'l', 'i', 'Q', 'e', '9437', 'i', '4709', 'w', 't', '1459', 'A', 'E', '923']

SOLUTION: eQil1017707B

PROBLEM: 6, 8, ['4263', '4799', 'D', '4627', 'P', 'z', '8589', '5107', 'T', 'R', 'L', 'G', 'd']

SOLUTION: 70159858z

PROBLEM: 10, 13, ['6329', 'Z', '2309', 't', '4089', '5815', 'P', '7691', '5563', 'F', 'l', '7559', 'S', 'W', '1127', '2749', '1435', '1951']

SOLUTION:
S9557lF