I have a set of data such as pic_ab011.tif, pic_ab012.tif, pic_ab013.tif, and so on. I want to get rid of the digits and assign the number whatever we want. For example, the result should be like this. First, all file names will be "pic_ab.tif" and then it will be pic_ab000, pic_ab001, pic_ab002, and so on. Do you have any suggestion? Thank you you guys in advance.