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: 15, 27, ['r', '4539', '8883', '7479', 'f', 'L', 'j', '7709', '5089', '4123', '2625', '3133', '9091', '2365', 'x', '5197', 'v', 'y', 'X', '6821', '6543', '3845', '6929', 'B', '8319', '7835', '9779', '4973']

x5197vyX6821654338456929B831978359779