Sorry your comment notification didn't showed up, so i just reply now. It is binary system, start from 2°= 1, there are 6 digits so stop until 32. For 110001-101110 , when there is 1 you must add the number, when there is 0 you don't. So the conclusion : 110001 : 32+16+1 = 49 ; 101110 : 32+8+4+2 = 46. The number in front is random, so just slide it