"Not unless we can count seventeen by twos," answered the Tin Woodman.
By twos and threes he would send out his sons to their labors, bidding them travel to their destination in the cheapest possible way.
"Why not start counting at a half of one?" asked the Saw-Horse, abruptly. "Then anyone can count up to seventeen by twos very easily."
The sheep were scattered in twos and threes, straying hither and thither; and old Roger alone was trying to collect them, and apparently having a hard time of it.