B to measure cycling in the East, a distance of 15 meters from the two together with seven. After the measurement is finished, go to B market. Find the distance to B is the nearest distance.
B biking to measure the east, a distance of 15 meters from the B to the Seven simultaneous measurements here, would be to let the market find the distance B is the distance to the nearest market.
B ride to the East is 15 meters. Two out of seven simultaneously after B to done. Go to the market to find the distance to the market B distance to the nearest.