p1: ${p1!"not found"}
p2: ${p2!"not found"}
p3: ${p3!"not found"}
wombat1: ${wombat1!"not found"}
wombat2: ${wombat2!"not found"}
wombat3: ${wombat3!"not found"}

x + 1: ${x + 1}
<#if test>It's a test.<#else>It's not a test.</#if>
time: ${time}