What is the boast sentence in The Proud Frog?

There is a proud frog who always thinks he is the best. One day, the proud frog boasted to his companions how great he was. At this moment, a cow just came to eat grass. The companion said, "Can you be a little bigger than that cow?" The proud frog said, "Of course!" Say that finish, the proud frog took a deep breath, and měnɡ bulged his stomach. The companion said, "Not big enough!" So the proud frog tried to inhale and bulge his stomach, trying to beat the cow. He smoked and smoked and finally burst his stomach with a bang.