c-- ccc ccd cce ccf ccg cdc cdd cde cdf cdg ce- cec ced cee cef ceg cfc cfd cfe cff cfg cgc cgd cge cgg dcc dcd dce dcf dcg ddc ddd dde ddf ddg de- dec ded dee def deg dfc dfd dfe dff dfg dgc dgd dge dgf dgg ec- ecc ecd ece ecf ecg ed- edc edd ede edf edg eec eed eee eef eeg ef- efc efd efe eff efg egc egd ege egf egg fcc fcd fce fcf fcg fdc fdd fde fdf fdg fec fed fee fef feg ffc ffd ffe fff ffg fgc fgd fge fgf fgg g-d gcc gcd gce gcf gcg gdc gdd gde gdf ge- gec ged gee gef geg gfc gfd gfe gff ggc ggd ggg