Suffixes and prefixes #CellTower 764

⬜⬜⬜⬜⬜➡️⬇️⬜⬜⬜⬜⬜⬜⬜⬜
⬜⬜⬜⬜⬜⬆️➡️➡️➡️➡️⬇️⬜⬜⬜⬜
➡️➡️➡️➡️➡️⬆️⬜⬜⬜⬜➡️➡️➡️➡️➡️

https://www.andrewt.net/puzzles/cell-tower/?p=764