what was gullivers initial reaction on learning about the stirld brutts of luggngg.why did he eventually not become immortar?

Can you please rewrite the above question? I'm not sure what you're asking about here.

gulliver was surprised when he came to know that strild bruggs were immortal. he thought that they were fortunate as they would not die. but soon his astonishment changed into a miser when he came to know about the miserable life of immortal people.