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