Find easy-to-read keymapping lists in /usr/share/X11/xkb/keycodes/symbols/pc.
If this doesn't work, try keymaps.
Keymaps codes can be found in /usr/share/X11/xkb/keycodes/evdev.
Swap the numbers to swap symbols.
Check keymap with:
setxkbmap -print -verbose 10