Rules

#0-The grid contains a sentence. There is only a letter per box.

#1-Letters situated on the outside outline of the grid indicate the alphabetical limits of a line and a column. The limit letters belong necessarily to the grid.
Every column is defined by 2 limits.
At the top:You read the smallest letter of the column. (minimal limit)
Below:You read the biggest letter of the column. (maximal limit)
Every line is defined by 2 limits.
To the left: You read the smallest letter of the line. (minimal limit)
To the right: You read the biggest letter of the line. (maximal limit)

#2-A square, an intersection of a line and a column, contains a letter included between the alphabetical limits of the line and the column, limits included.
You cannot write in a square a letter smaller than minimal letters of its line and its column.
Also, you cannot write in a square a letter bigger than maximal letters of its line and its column.

#3- Squares of the same number have for solution the same letter: a reasoning on a numbered square has to come true on all the squares of the same number.

#4-A square without number indicates a unique letter (represented only once in the sentence) defined by one of 4 limits.

#5-A unique letter (represented only once in the sentence) different from limits of its line or from its column is automatically given to the starting up of the grid.

#6-The first letter of the sentence is notified with a black square.

#7-The road of reading of the sentence must always be continuous, horizontal or vertical, without break and without overlapping.

Remarks:
With these points, you have to deduct the sentence from it.
- To begin: Look for the smallest letter of the grid and on the biggest letter of the grid.
- then the following letters and the nexts.
- get rid of on the alpahbet, letters bigger than maximal limit of the grid and the letters smaller than the minimal limit of the grid.