B CAREFUL

Be not B  it is mean the axuiliary verb.

carefull start from with "C" , but people says B be careful

Actually I don't quite understand what your sentence means.  Grammatically I think it should read:

"Carefull " starts with "C", but people say "B careful / Be careful". ("B" often refers to "be" when people are sending text to others in order to save space in the message.)

Hello,

A person- people

a man- men

a child-children.....so on

Why did you use "says"?

Use says in a sentence

• It may be worth while to be careful what one says before her. 
• Says it is to call it by when I want it to come.
• Also, when she talks, she is unstable, she wanders, she is incurably inconsistent; what she says to-day she contradicts tomorrow. 
• and winks, and says, very modernly: Home again, at Camelot. 
• The hired man says that he was very much scared by the hooting of an owl.The new creature says its name is Eve. 
• Nevertheless, what he says is interesting. 

You'r right, it was a gramatical mistake!! sorry 

The people says...hehe, hmm...normally you will hear in the USA "People, (they)say.."

However if it's grammatically correct, then it's fine. We were never a people of rules here...

a people; I meant to say "a group of people" ohmigosh....

Letter S couse me alot of problem!!