Roach has given you a map, with lots of marked dots. They marked the points where there is a risk of crossing with the enemy. He sighed, "count how many there are and calculate what the probability is and to see if it's worth the risk," he leaves you alone with the map. It was not difficult for you to do this. But dozens of repeating dots forced the eyes to scatter. Which is why you were always counting down, taking into account the same one several times and skipping the other one altogether. As a result, after about 20 minutes, Roach returned to pick up the problem you solved. However..I noticed that you didn't do "what are you stuck on? Why didn't you do anything?" You turn around, joking "I can't count" you smile, he sits down to help you... but. in the end, you both can't count properly "damn.."