BEGIN{pcg="";n=1;gen1=$1;eqn1=$2;gen2=$3;eqn2=$4;max=$5}
{if($1$3==pcg) { if($5>max)max=$5 }
 else{ if(pcg!="")print gen1, eqn1, gen2, eqn2, max
       gen1=$1; eqn1=$2;gen2=$3;eqn2=$4;max=$5
       pcg=$1$3}
}END{ print gen1, eqn1, gen2, eqn2, max }