[antlr-interest] probably too obvious to see it - plz help

[tdjastrzebski]

I ma probably too tireed to see it. Why following two lexer rules 
cause nondeterminism (k=2).

Identifier
	: ('a'..'z')+
	;
StringLiteral
	: ('n')? '\'' (~'\'')* '\''
	;

StringLiteral rule is supposed to match unicode strings like: 
n'blabla'

Thanks in advance.
Tom Jastrzebski

full test grammar:

options {
	language = "Java";
}

class TestParser extends Parser;
options {
	k = 2;
}

expression
	: (Identifier | StringLiteral) EOF
	;

class TestLexer extends Lexer;
options {
    k = 2;
}

Identifier
	: ('a'..'z')+
	;

StringLiteral
	: ('n')? '\'' (~'\'')* '\''
	;


 

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