code class$=$"asciimath"$>$V$=$P$,$Q$,$R$,$S$,$T$,$U$,$ d$\_($in $)($P$)=3,$d$\_(\_())($out $)($P$)=1,$d$\_($in $)($R$)=2,$d$\_($out $)($R$)=2,$d$\_($in $)($T$)=2,$d$\_($out $)($T$)=2$ d$\_($in $)($Q$)=1,$d$\_(\_())($out $)($Q$)=3,$d$\_($in $)($S$)=3,$d$\_(\_())($out $)($S$)=2,$d$\_($in $)($U$)=0,$d$\_(\_())($out $)($U$)=1$