instruction:
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.
question:
5, 13, ['9669', '7783', 'M', 'Q', 'U', '3521', '9305', 'X', 'd', '7401', '4845', '9237', 'P', 'o', 'O']
answer:
U35219305Xd740148459237P


question:
12, 12, ['d', 'E', 'x', '3077', 'H', 'G', '7227', '1323', '997', '8825', '9645', '6573']
answer:
6573


question:
2, 7, ['R', 'N', 'j', 'V', 'm', '3755', '2859']
answer:

NjVm37552859