IDENT 3 "foo"
WHITESPACE 1 " "
IDENT 4 "foo_"
WHITESPACE 1 " "
IDENT 4 "_foo"
WHITESPACE 1 " "
UNDERSCORE 1 "_"
WHITESPACE 1 " "
IDENT 2 "__"
WHITESPACE 1 " "
IDENT 1 "x"
WHITESPACE 1 " "
IDENT 12 "привет"
WHITESPACE 1 "\n"