Once upon a time
A man needed to measure
Everyone in the land
For the king could know
The health of his people
The man needed a way
To do it quite fast
Keep it quite simple
So he thought and thought
And came up with a way
That works for most
And works just fine
But there are a few
Not very many
What its answer
Is really quite bad
Some who are fat
But not very tall
It says they are healthy
And some who are thin
And really quite tall
Its says they are sick
But for most
It works quite well