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: 4, 21, ['O', '1645', '4521', 'k', 'K', 'V', '5595', 's', '8791', 'I', '5529', '2795', 'L', 'g', 't', '4263', 'e', 'b', '8273', 'R', 'T', 'q']

kKV5595s8791I55292795Lgt4263eb8273RT