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$n =1; $ref = "n"; $$ref = 2;
g <@> leave[1 ref] vKP/REFC ->(end) 1 <0> enter ->2 ... e <1> rv2sv sKRM*/1 ->f d <1> rv2sv sKM/DREFSV,1 ->e c <#> gv[*ref] s ->d