FUNGI: the five-cell route
Trace FUNGI from row 4, column 3. Move down, turn left, and then continue down twice, reading F → U → N → G → I. This route makes two turns across three straight segments, spans four rows and two columns, visits one edge cell, and does not visit a corner.
Follow these cells in order: 1 at row 4, column 3; 2 at row 5, column 3; 3 at row 5, column 2; 4 at row 6, column 2; 5 at row 7, column 2. The starting cell has three open orthogonal neighbors, while the ending cell has two. Assigning this route uses five cells and leaves 31 open cells.