When Mateo left the subway station, he checked his phone and opened the map. He followed the blue line for several blocks, but then his phone suddenly turned off. The battery was dead. Mateo stopped and looked around. He remembered the name of his hotel, but he forgot the exact address. He tried to remember the route, but every street looked the same. He walked for another fifteen minutes and became more confused. Finally, he entered a small grocery store and asked the cashier for help. The cashier spoke quickly, so Mateo understood only a few words. He thanked her and walked outside again.