Count diamonds level 3 by yshl

20{(%stdin)(r)file 451 string readstring 0 0 1 376{-1( HJ){5 index exch 3 index
add get and}forall exch pop 42 eq{1 add}if}for =}repeat

Note that non-ascii characters in the above source code will be escaped (such as \x9f).

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