18 h in g likely means converting 18 hours to grams, which doesn't make sense because hours and grams are units of time and mass, respectively. It's possible there was a mistake or misunderstanding in the question.
18 inches of mercury
18 Holes on a golf course.
18 holes on a golf course !
18 holes in a golf course
18 Holes on a Golf Course.
18 = holes in golf
18 Holes on a Golf Course
18 holes on a golf course
n n n n n n n n n n n n n n n o o o o o o o o o o o o o t t t t t t t t t t t h h h h h h h h h h h h h h i i i i i i i i i i n n n n n n n n n n g g g g g g gg g g g g g g g gg gg g
18 Holes on a Golf Course - I think the 'F' is wrong there.
H on a GC may mean holes on a golf course.
Being G is being gangsta, its like a joke because its abcdefG and then H.