Definition: In this task, you are given inputs i,j, and A, where i and j are integers and A is a list. You need to concatenate all elements of A from the ith element to the jth element, and print the resultant 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.
Input: 3, 18, ['4701', 'd', 'r', 'Y', 'v', 'U', '2687', '4061', '5937', '9181', '4375', '8567', '5751', 'U', 'X', 'a', 'E', '3105', '7251', '7303']

rYvU2687406159379181437585675751UXaE3105