<?xml version="1.0" encoding="UTF-8"?><structure><type>grammar</type><production><left>S</left><right>AaB</right></production><production><left>S</left><right>Aa</right></production><production><left>S</left><right>dDc</right></production><production><left>A</left><right>AAa</right></production><production><left>A</left><right>a</right></production><production><left>B</left><right>bB</right></production><production><left>B</left><right>bBb</right></production><production><left>C</left><right>cD</right></production><production><left>D</left><right>aAb</right></production></structure>