27 13 al 4 2 he → 30 15 p July 8, 2019 16 32 64 128 27 13 al 4 2 he 30 15 p 27/13al + 4/2he Al(27 13) + he(4 2) = x + p Al(13 27) + = na(11 24) + he(2 4)