Second argument of substr is the length of the substring, _not_ the position. With positions, it's better to do like this.
Example:
```sh
[2023-01-29 13:08:00.927] [debug] hyprland IPC received activelayout>>ITE Tech. Inc. ITE Device(8910) Keyboard,Russian (with Ukrainian-Belorussian layout)
[2023-01-29 13:08:00.927] [debug] kbName is ITE Tech. Inc. ITE Device(8910) Keyboard,Russian (with
```
After the fix it's correct:
```sh
[2023-01-29 13:11:11.408] [debug] hyprland IPC received activelayout>>ITE Tech. Inc. ITE Device(8910) Keyboard,Russian (with Ukrainian-Belorussian layout)
[2023-01-29 13:11:11.408] [debug] kbName is ITE Tech. Inc. ITE Device(8910) Keyboard
```
The current output form of `hyprctl devices` is like this:
```
Keyboard at 6f80ad70:
ITE Tech. Inc. ITE Device(8910) Keyboard
rules: r "", m "", l "us,ru", v "", o "grp:alt_shift_toggle"
active keymap: Russian
main: no
```
That is, `Keyboard at` goes _before_ the keyboard name, so looking for `Keyboard at` only makes it skip to the keyboard _after_ the one that the user specified.
