This test is a measure of the ability to find the shortest possible route between any two stations (represented by a alphabets) in the shortest possible time. Below is given the map of a city. Dark lines indicate streets. The circles represent barriers which can not be crossed. Squares containing numbers represent houses. You have to find the shortest possible route between two alphabets. The number of the house passed by will be your answer.
(1) The shortest route will always pass by only one house.
(2) If a route touches only the corner of a house then it will not be counted.
(3) The same house can fall in more than one route.