X = Bob Sue Pat ;
Y = "" "" ;
Echo Hello $(X)$(Y) ;
Y Z = test ;
Y = ;
Z = $(X)$(Y) ;

rule MyRule
{  
  Echo First arg is $(1) ;
  Echo Second arg is $(2) ;
  Echo Third arg is $(3) ;
}

actions MyAction
{
  ytouch $(1)
cat $(2) >> $(1)
}