B2-16-17* 18 ...
B2-16-17 18* ...
B2-13-4 5* ...
C2-16-23...
C2-16-20 21*...
B3-21-49* 50 ...
B3-21-49 50*...
B2-13-4* 5 ...
C2-16-20* 21 ...
B3-23-23 24*...