C1x-C1y:*-O1a:C1x+C1z-C1x+C1z
C1x-C1y:*-O1a:C1x+C2y-C5x+C2y
C1x-C1y:*-O1a:C1y+C1y-C1y+C1z
C1x-C5x:*-O5x:C1x+C1z-C1y+C1z
C1y-C1y:O1a+*-*+O2x:C1x+C2y-C1x+C1z
C1y-C1z:*-O1a:C1x+C1x+C1z-C1x+C1y+C1z
C2a-C1x:*-O2x:C2y-C1z
C2y-C1z:*-O7a:C1y+C1y+C2a-C1y+C1y+C1x