<script type="text/javascript">
function decode(str){
return str.replace(/\\x(\w{2})/g,function(_,$1){ return String.fromCharCode(parseInt($1,16)) });
}
function encode(str){
return str.replace(/(\w)/g,function(_,$1){ return "\\x"+ $1.charCodeAt(0).toString(16) });
}
alert(encode("bfw"));
alert(decode("\x62\x66\x77"));
</script>
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