(c4) (f_g) (g'_) (,) (f) (g') (h) (gf) (g_h) (f_e) (d.) (;) (ge~) (gh) (g) (f) (fg) (f'_) (,) (f) (g') (f) (e_f) (g) (fe) (d.) (d.) (::) (h) (h) (g) (f) (g) (ghg.) (::)