This puzzle makes you play Minesweeper on the same board until you uncover all the safe squares.

On the Grade 1 board, the mine locations, when read in Braille, read “Braille!”—which is self-confirming.

O.O.O..O
O.OO..O.
..O.....
O.O.O...
O.O..OOO
O.O...O.

On the Grade 2 board, the mine locations have to be read using Grade 2 Braille. Using any reference for Grade 2 Braille leads us to the string “contract_or_therapist” (actually more like “contract or therapist”)—which clues SHRINK.

...OO.O.
OOOOOO..
..O.O...
OO.O.OO.
..OO...O
..O..OO.
O..O.OO.
OO..O.OO
O..OOOO.
O.OO.O.O
..O.O...
..O...O.