First route: ALL
Trace ALL through three cells: 1 at row 5, column 4; 2 at row 4, column 4; 3 at row 4, column 5. Reading those positions in sequence gives A → L → L. The first step goes up, and the second goes right, so each consecutive letter is orthogonally adjacent.
This compact route changes direction once and consists of two straight segments. It spans two rows and two columns, visits the board edge twice, and does not visit a corner. Both its starting cell and ending cell have two open orthogonal neighbors. Once these three cells are assigned, 16 open cells remain for the later routes.