B ... 204248 ...
A ... 204249 ...
D ... 204250 ...
C ... 204251 ...
E ... 204252 ...
A ... 204253 ...
F ... 204254 ...
C ... 204255 ...
B ... 204256 ...

##</code><code>##

A 204249   # first pas
A 204253
B 204248   # second pass
B 204256
C 204251   # third pass
C 204255

##</code><code>##

B 204248
A 204249
C 204251
A 204253
C 204255
B 204256