GIASFELFEBREHBER Puzzle Solution
You can move diagonally. Start at the top left and move down then to the right. There you have to do some diagonal shenanigans to solve it.
Note: You can solve it without moving diagonally as well. After the B, I moved to the R to the right, then to the E directly above, then the H to the left, then the B below, then the E to the left, then the R above.