A=1-B-C D=2-B-CE=3-C-D=3-C-2+B+C=1+BF=4-D-E=4-2-B-C-3+C+2-B-C=1+CG=5-E-F=5-2+B+C+3-C-2+B+C-3+C+2-B-C=3-B-CH=6-F-G=2+BI=7-H-G=2+CA+E+I=1-B-C+1+B+2+C=4