But ьутг = meng (ь=m, у=e, т=n, г=u? Wait г=u, yes) — so meng .

So whole string: 00;30 l]aden meng — still not right. Maybe they intended Russian but typed in English layout.

Let's map back: д (Russian) is pressed by l (US key). щ = ] ф = a в = d у = e к = r ? Wait check: к is on r key? Yes: Russian к is on US r . So дщфвук = l]ader — almost "lader" (maybe "ladder"?).

It looks like you've provided a string of characters that appears to be in a Cyrillic-based keyboard layout (likely Russian) typed with the hands shifted one key to the right (or left) from the standard home position.