There are two workers , one on a ladder , against a blue wall with a yellow-and-black stripe .
It is almost certain that a man waits for another to climb a ladder near a wall .
Chances are about even that a man waits for another to climb a ladder near a wall .
It is almost certain that a man waits for another to climb a ladder near a wall .
A man waits for another to climb a ladder near a wall .