: ● ● ●2-3 ● ● ● : . , . . . , . , , , . 2-3 . "" , . . 200-250 . , . 5- . , . , . "" . . . , . . . ( ) . "". , "" . , . . . , , , 4 . . . . . , . "" . , , "". . " ", . 20, , . , . , , . . "" . "" .