WF-A
CL-B WF-B
CL-D WF-D
CL-D WF-B
CL-A WF-B
CL-B WF-A
CL-A WF-C
CL-A WF-A
WF-C
WF-D
CL-B WF-D
CL-C WF-C
CL-B WF-C