sub f {
$_=pop;y/ACUG/0123/;s|(.)(.)(.)|(map{ord>91?uc:(),uc}
'KnKttiIMRsRQhQppllrr.y.ssLfL.cWEdEaavvgg'=~/./g)[$1*16+$2*4+$3]|eg;$_
}