<tmpl_loop foo><tmpl_var __counter__><tmpl_var a></tmpl_loop>
<tmpl_loop outer><tmpl_var __counter__><tmpl_loop inner><tmpl_var __counter__><tmpl_var a></tmpl_loop></tmpl_loop>
<tmpl_loop foo><tmpl_var __counter__><tmpl_var a></tmpl_loop>
<tmpl_loop outer><tmpl_var __counter__><tmpl_loop inner><tmpl_var __counter__><tmpl_var a></tmpl_loop></tmpl_loop>