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: 7, 21, ['I', 'A', 'S', 'Z', '7961', 'W', 't', 'R', '3267', 'k', '7431', '5029', '717', '2923', 'Z', '845', 'R', 'L', 'g', '9365', 'o']

tR3267k743150297172923Z845RLg9365o