Specified feeding relationships
 Descendant                   Mother
 MRULE-A                      MRULE-Q
 MRULE-A                      MRULE-X
 MRULE-A                      MRULE-Z
 MRULE-Q                      MRULE-X
 MRULE-X                      MRULE-W
 MRULE-Z                      MRULE-Q
 MRULE-Z                      MRULE-X
RAINAZ 3 3 0 3 3
RAINAX 4 4 0 8 3
RAINAW 0 0 0 0 2