Look carefully at the products and the reactants.
CO(NH2)2
Notice how Urea (above) seems to be very familiar to a combo of NH3 (ammonia) and CO2 (Carbon Dioxide) ??
But notice that the one Hydrogen from Ammonia and the One Oxygen from CO2 are missing ?
Where did they go ? Thus, you can make an informed guess that a water molecule was formed in this reaction.
I believe this reaction was part of the syllabus for 2006 but not for us.