Puzzle 027: The Rainbow Cottage

ナゾ０２７　虹のコテージ
虹のコテージは観光客に人気の場所
である。全部で１２本の橋がかかって
いて、海の上を散歩することができる
のだ。今、ある夫婦が船でコテージの
１つに渡り、各コテージをつなぐ橋を
１回だけ通り全部のコテージを巡って
Aから陸地に帰ろうと考えていた。
さて、この夫婦は最初に船で
どのコテージに渡ればよいのだろうか。

Google Translate
Rainbow Cottage is a popular place for tourists. A total of 12 books they took the bridge, they can walk on the sea. Now, the couple's cottage in one boat went to one, the bridge between each cottage cottages all over the place and go home only once A thought from the land. Now, how can this husband and wife if the first boat which crosses the cottage.

Notes on Puzzle
You're given a map with a number of cottages (marked A through G) that are connected by a series of bridges. You need to figure out which cottage you need to start at if you want to finish up at cottage A, which is linked back to the mainland.