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: 11, 18, ['z', 'C', '9907', '8851', 'c', '6661', 'U', '8727', 'h', '9503', 'k', 's', '5447', 'N', 'Z', 'R', '5789', 'n', '1473', 'a', '4019', '4335', '6687', '3379', '5745', '5815']

ks5447NZR5789n