H3c

H3cH3cH3cH3c
H3cH3cH3cH3cH3cH3cH3cH3c
H3cH3cH3cH3cH3cH3cH3cH3cH3cH3cH3cH3c
H3cH3cH3cH3cH3cH3cH3cH3cH3cH3cH3cH3cH3cH3cH3cH3c
H3cH3cH3cH3cH3cH3cH3cH3c