Considering I'm going away for a week, I'll post the hint now...
One of five, I the only one,
One in cat, two in mitten,
Two are odd, five are even
Seven in all, one in seven.
Interesting to see that only 1 person has actually attempted to answer the riddle other than the people that already *know* the answer of-course.
Any takers? Come on Tom, you can do it
