B = {10; 11; 12; 13; 14; 15; 16; 17; 18; 19; 20}
B = 10; 11; 12; 13; 14; 15; 16; 17; 18; 19; 20
B = {11; 12; 13; 14; 15; 16; 17; 18; 19}