Fill command in minecraft?

gr
2

How must the / fill command in minecraft be exact to fill the area from -5 102 27 to -5 92 90 with black concrete? So far I'm at / fill -5 102 27 -5 92 90 Minecraft:

But I do not know what black concrete means

Sh

Black_concrete

cl

/ fill x y z x2 y2 z2 material

So

/ fill -5 102 27 -5 92 90 black_concrete (replace)