When a light passenger plane flew off course some time (1)_ it crashed (2)_ the mountains and its pilot was killed. (3)_ only passengers, a young woman and her two baby daughters were unhurt. It was the (4)_ of winter. Snow lay thick (5)_ the ground. The woman knew that the nearest village was miles (6)_ When it grew dark, she turned a suitcase (7)_ a bed and put the children inside it, covering them (8)_all the clothes she could find. During the night, (9)_ got terrible cold. The woman kept as near as she (10)_to the children and even tried to get into the case herself, but it was too small. Early the (11)_ morning, she heard planes passing overhead and wondered how she could (12)_ a signal. Then she had an idea. She stamped out the letters "SOS" in the snow. Fortunately, a pilot saw the signal and sent a message (13)_ radio to ncarest town. It was not (14)_ before a helicopter arrived on the scene and (15)_ the survivors of the plane crash.