Matrix Product by rotary-o(clock)

for(s<-""++io.Source.stdin split"\n\n";m=s split'
'map(_ split' ');n=m.size){for(x<-m;y<-1 to n)print{>x(m indexOf z).toInt*z(n+y).toInt).sum+""+" \n"(y/n)};println}

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

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