1a1 = $0 2a2 = $1 3a3 = $3 4_RS = $7 5b1 = $7 6b2 = $8 7b3 = $A 8_RS = $E 9c1 = $2A 10c2 = $2B 11c3 = $2D 12_RS = $31 13d1 = $0 14d2 = $1 15d3 = $3 16_RS = $7 17