One two buckle my shoe

One, two, buckle my shoe;
Three, four, knock at the door;
Five, six, pick up sticks;
Seven, eight, lay them straight;
Nine, ten, a good fat Hen;
Eleven, twelve, dig and delve;
Thirteen, fourteen, maids a-courting;
Fifteen, sixteen, maids a-kissing;
Seventeen, eighteen, maids a-waiting;
Nineteen, twenty, my plate's empty;