\v=6
\v~=\w Greet|x-occurrence="1" x-occurrences="1"\w* \w Mary|x-occurrence="1" x-occurrences="1"\w*, \w who|x-occurrence="1" x-occurrences="1"\w* \w worked|x-occurrence="1" x-occurrences="1"\w* \w very|x-occurrence="1" x-occurrences="1"\w* \w hard|x-occurrence="1" x-occurrences="1"\w* \w for|x-occurrence="1" x-occurrences="1"\w* \w you|x-occurrence="1" x-occurrences="1"\w*. 
\¬v