On every execution, delc checks /tmp/delc.conf for a 0 or a 1.
- If the file doesn't exist, it touches it and sets PRIMARY as active.
- If it's a 0, it sets SECONDARY as active and echoes a 1 to the tmpfile.
- If it's a 1, it sets PRIMARY as active and echoes a 0 to the tmpfile.
- Install delc somewhere in your path.
PRIMARY="us intl" SECONDARY="ru" delc