vectors =. ((% +/&.:*:"1) _1 1 0,:_1 _1 3) +/@:*"1/~ 2 3 4*=i.3
   ' .*o' {~  +/ 1 2 3* (|:"2 -."_ 1~ vectors) ([:*./ 1 = 0 1 I. %.~)"_ 1"_1 _ ]4j21 ,~"0/&:i: 4j41







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