I have long text file
gallery-dl -g -i w4b027.txt >
gallery-dl -g -i a4b028.txt >
gallery-dl -g -i b4b029.txt >
gallery-dl -g -i c4b030.txt >
gallery-dl -g -i d4b031.txt >
gallery-dl -g -i w4b032.txt >
gallery-dl -g -i w4b033.txt >
gallery-dl -g -i w4b034.txt >
gallery-dl -g -i w4b035.txt >
gallery-dl -g -i w4b036.txt >
gallery-dl -g -i w4b037.txt >
gallery-dl -g -i w4b038.txt >
gallery-dl -g -i w4b039.txt >
gallery-dl -g -i w4b040.txt >
I want to make it
gallery-dl -g -i a4b027.txt > a4b027x.txt
gallery-dl -g -i b4b028.txt > b4b028x.txt
gallery-dl -g -i c4b029.txt > ...
First text file to 2nd text file with sufix "x".
