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, 14, ['555', 'v', 'f', 'c', '3327', '3037', '1781', 'u', 'T', 'P', '787', 'R', '1851', 'r', '6515', '8993', 'D', 'b', '4811', '1349', '7413', '3893']

1781uTP787R1851r