Letters into one word

I´m doing a licence plate recognition project, and I want to use the OCR. I managed to split the plate into characters, but they are seperate files. so i built a for loop for the amount of images. My problem is that the OCR overwrites the previous images with the last one , so he writes only the last character in the txt file. I need them all in a line. I think it somehow involves word=[word letter]; with a loop .

[Image Analyst]

Try this link