Is it GRAPHITE or SANDSTONE?
GRAPHITE
Is it COAL or MARBLE?
COAL
Is it MARBLE?
NO. IT'S CHALK.
Is it GRAPHITE?
YES. IT'S GRAPHITE.
Is it HARD or SOFT?
SOFT
Is it MARBLE or SANDSTONE?
MARBLE
Is it HARD or SOFT?
SOFT
Is it CHALK or SLATE?
CHALK
Is it GRANITE or SANDSTONE?
SANDSTONE
Is it HARD or SOFT?
SOFT
Is it HARD or SOFT?
HARD
Is it DIAMOND?
NO. IT'S SANDSTONE.
Is it HARD or SOFT?
HARD
Is it CHALK?
NO. IT'S SLATE.
Is it COAL?
YES. IT'S COAL.
Is it CHALK or DIAMOND?
DIAMOND
Is it GRANITE?
YES. IT'S GRANITE.
Is it SLATE?
NO. IT'S DIAMOND.
Is it HARD or SOFT?
HARD
Is it SLATE or DIAMOND?
SLATE
Is it DIAMOND or GRANITE?
GRANITE
Is it HARD or SOFT?
HARD
Is it HARD or SOFT?
SOFT