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: 12, 16, ['1945', '7139', 'p', 'k', '5433', 'M', 'f', 'A', '1675', '3841', '6407', 't', 'V', '7869', '1971', '8677', 'T', '1867']

tV786919718677