Грамматика и Лексика

Преобразуйте, если это необходимо, слово FOOT так, чтобы оно грамматически соответствовало содержанию текста.

We had lunch and then started to play Frisbee in the ocean. Suddenly I stepped off an underwater ledge and fell in over my head. I panicked and swallowed some water. Luckily, a lifeguard ended up towing me ten ________ towards the shore where I could just walk out.