First line

{{ bl1
	 In block 1
	 {{ bl2
		 In block 2 %%tag1%%
		 {{ bl3
			 IN block 3 %%DP%% %%DCL%% %%DCR%% %%!bl5%%
		 }}
		 In block 2 again

		He
{{ bl4
l
}}
o

}}
	 
	 %%!bl5%%
	   }}   	

>>
{{ !bl5
	{{ bl6
		{{bl7
	hidden block %%DCL%% %%DCR%% %%DP%%
		}}
	}}
}}
<<
%%tag2%%
	 
Last line!
