80% of basic svs... If SBS has 220 basic svs, only 44 can be
excluded 
Maybe they can be Sv 5, 11, 29, 32, 34, 35, 39, 40, 42, 43, 45, 48,
52, 57, 58, 59, 66, 73, 76, 79, 85, 103, 109, 115, 119, 123, 124,
125, 132, 136, 138, 139, 155, 158, 160, 162, 163, 181, 182, 186,
191, 194, 200, 251... Oops at this rate is going to exceed liao
