friend of a friend by rotary-o

val a=""++io.Source.stdin split'
'map(_ split'$')
for(s<-a map(_(0))distinct)printf(s+"$%x\n",a filter(_(0)==s)map(b=>BigInt(b(1),16))product)

Note that non-ascii characters in the above source code will be escaped (such as \x9f).

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