B 12 11 April August December February January July June March May November October September [-10;-5] [-15;-10] [-20;-15] [-25;-20] [-5;0] [0;5] [10;15] [15;20] [20;25] [25;30] [5;10] ....XXXX..X ......XXXX. XXX.XXX...X XXX.XXX...X XXXXXXX...X ......XXXX. ......XXXX. X...XXXX..X ......XXX.X X...XXXX..X ....XXXXX.X ......XXX.X