diff --git a/table.tsv b/table.tsv
index de03091..660aff5 100644
--- a/table.tsv
+++ b/table.tsv
@@ -1383,7 +1383,9 @@ Ms{⍵⌷⍨⊂⍋⍋⍺×⍋⍵}A	Sort A according to Ms (1: ascending, 0: unor
 ' '@{2=⌈\' 0'⍳⍵}D	Replace leading zeros with blanks	Tacit	Monadic Function		Text	spaces nulls zeroes nils naughts noughts 0s falses falsehoods start beginning string		
 M(*⍤-⍤⊣×*÷!⍤⊢)N	Poisson distribution of states N with average M	Tacit	Dyadic Function		Mathematical			
 X(⍳⍨∘⊖⍨-⍨1+∘≢⊣)Y	Last indices in X of major cells Y, 0 if not found	Tacit	Dyadic Function		Index Generation	indexin indexof find locate positionof zero locating items elements location		
-Iv(⍳⍤≢⍤⊣⌷∘⊃⍤0⌷⍤0 99)Y	Merging Y[1] Y[2] Y[3], … under control of Iv (1:cell from Y[1], 2:cell from Y[2], …)	Tacit	Dyadic Function		Selection	zipping merge merging interweave interweaving interleave interleaving shuffle shuffling meshing		
+Iv(⍳⍤≢⍤⊣⌷∘⊃⍤0⌷⍤0 99)Y	Merging Y[1] Y[2] Y[3], … under control of Iv (1:cell from Y[1], 2:cell from Y[2], …)	Tacit	Dyadic Function		Selection	zipping merge case merging interweave interweaving interleave interleaving shuffle shuffling meshing	https://tio.run/##hY8xS8NAFMf3foq3JQFTk8bBDg61dXMQcROHMznag5CrdxepiJNQ0mJEB8HFoVVQXFWEjn6U90Xiu1ZFhCLc3eNx7//4/Vg/9ZMTlspuVWF5B3h5g8OrCBoQ0o3AxfIFywccTe07vseLdyxucXxObWAbKtBseuCwwzjhDjitzXZni2oQNqI1p2aX7rFYGDjmSguZAZ3WznabKQOKH@VCcQ2dOQKE6/UApIKUGa5qi2xP6J9ormk25SwRWddnA/qJZaaNymOj67D7vc3F8RRHEyyePQtOvOXrxxOWb7W/eqfkN1uZu5CnlZx57kIrtFo4vKbY2VK7JYg6ZoYM/L4UmQE37kmpuQciS/iA0H@hYvG4Gm78Tznn8PYtrZ35Yj1YTlZVnw	https://aplwiki.com/wiki/Case
+Iv{(⍺,⍤0⍳≢⍺)(⌷⍤1 99)↑⍵}Y	Merging Y[1] Y[2] Y[3], … under control of Iv (1:cell from Y[1], 2:cell from Y[2], …)	Dfn	Dyadic Function		Selection	zipping merge case merging interweave interweaving interleave interleaving shuffle shuffling meshing	https://tio.run/##hY8xS8NAFMf3foq3JQFTk8bBDg61dXMQcROHMznag5CrdxepiJNQ0mJEB8HFoVVQXFWEjn6U90Xiu1ZFhCLc3eNx7//4/Vg/9ZMTlspuVWF5B3h5g8OrCBoQ0o3AxfIFywccTe07vseLdyxucXxObWAbKtBseuCwwzjhDjitzXZni2oQNqI1p2aX7rFYGDjmSguZAZ3WznabKQOKH@VCcQ2dOQKE6/UApIKUGa5qi2xP6J9ormk25SwRWddnA/qJZaaNymOj67D7vc3F8RRHEyyePQtOvOXrxxOWb7W/eqfkN1uZu5CnlZx57kIrtFo4vKbY2VK7JYg6ZoYM/L4UmQE37kmpuQciS/iA0H@hYvG4Gm78Tznn8PYtrZ35Yj1YTlZVnw	https://aplwiki.com/wiki/Case
+Iv{(↑⍵)[⍺,¨⍳≢⍺]}Y	Merging vectors Y[1] Y[2] Y[3], … under control of Iv (1:cell from Y[1], 2:cell from Y[2], …)	Dfn	Dyadic Function		Selection	zipping merge case merging interweave interweaving interleave interleaving shuffle shuffling meshing	https://tio.run/##hY8xS8NAFMf3foq3JQFTk8bBDg61dXMQcROHMznag5CrdxepiJNQ0mJEB8HFoVVQXFWEjn6U90Xiu1ZFhCLc3eNx7//4/Vg/9ZMTlspuVWF5B3h5g8OrCBoQ0o3AxfIFywccTe07vseLdyxucXxObWAbKtBseuCwwzjhDjitzXZni2oQNqI1p2aX7rFYGDjmSguZAZ3WznabKQOKH@VCcQ2dOQKE6/UApIKUGa5qi2xP6J9ormk25SwRWddnA/qJZaaNymOj67D7vc3F8RRHEyyePQtOvOXrxxOWb7W/eqfkN1uZu5CnlZx57kIrtFo4vKbY2VK7JYg6ZoYM/L4UmQE37kmpuQciS/iA0H@hYvG4Gm78Tznn8PYtrZ35Yj1YTlZVnw	https://aplwiki.com/wiki/Case
 (0~⍨¯1-2-/∘⍸1,1,⍨~)Bv	Lengths of groups of ones in Bv	Tacit	Monadic Function		Boolean/Logical	runs 1s trues truths contiguous shapes tally tallies counts		
 (2÷⍨⍋∘⍋+⍒∘⍋∘⌽)Nv	Assign ascending ranking based on scores Nv (ties all get average ranking of used slots)	Tacit	Monadic Function		Mathematical	places place-values positions shared allotted allocation allocate ranks ⍒⍋ ⍒⍤⍋	https://tio.run/##SyzI0U2pTMzJT////1Hf1EdtExQ0jA5vf9S74lFv96OOGUBS@1HvJAgLRPbs1VQwBkNTBQsgNDL8/x8A	
 (2÷⍨⍋∘⍒+⍒∘⍒∘⌽)Nv	Assign descending ranking based on scores Nv (ties all get average ranking of used slots)	Tacit	Monadic Function		Mathematical	places place-values positions shared allotted allocation allocate ranks ⍒⍒ ⍒⍤⍒	https://tio.run/##SyzI0U2pTMzJT////1Hf1EdtExQ0jA5vf9S74lFv96OOGY96J2kDMYQFInv2aioYg6GpggUQGhn@/w8A