Understand that you need to process a CSV file in Snapman where column C contains eighteen-digit strings of numbers, and you want to get the four characters starting with the seventh character in column D for each column C string.
3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40