Easy As (Diagonal Clues) (1173)

Place letters of the specified list into some cells, no more than one letter per cell, so that each letter appears exactly once in each row and column. The letters outside the grid indicate the first letter that can be seen in the respective row, column, or diagonal from the respective direction. Some letters may already be filled in for you. Some cells might be marked with a cross; do not put any letters into those cells. (Note that letters may repeat on diagonals.)

Reference: WPF (1)