i:.''":"\'0:"i/7"
+/{x*|/x=y[0]{y[1;x;*y]}/'(1_y),'/:+(+;*)@!1_2|^y}.'i
+/{x*|/x=y[0]{y[1;x;*y]}/'(1_y),'/:+(+;*;{`I$($x),$y})@!1_3|^y}.'i