<?php

//Create a method that takes two strings as arguments and returns the sum of their character codes multiplied
//(multiply str1.charAt (0) with str2.charAt (0) and add to the total sum). Then continue with the next two characters.
//If one of the strings is longer than the other, add the remaining character codes to the total sum without
//multiplication.

$str=readline();
//$str="123 522";
$divided=explode(" ",$str);
$str1_arr=str_split($divided[0]);;
$str2_arr=str_split($divided[1]);

$i=0;
$len1=count($str1_arr);
$len2=count($str2_arr);
$diff=$len1-$len2;

if($diff>0)
{
    for($i=0;$i<$diff;$i++)
    {
        $str2_arr[$len2+$i]=1;
    }
}
elseif($diff<0)
{

     for($i=0;$i<abs($diff);$i++)
    {
        $str1_arr[$len1+$i]=1;
    }
}
$sum=0;

for($i=0;$i<count($str2_arr);$i++)
{
    if(is_string($str1_arr[$i]))
    {
        $str1_arr[$i]=ord($str1_arr[$i]);
    }
    if(is_string($str2_arr[$i]))
    {
        $str2_arr[$i]=ord($str2_arr[$i]);
    }
    $sum+=$str1_arr[$i] *$str2_arr[$i];
}
echo $sum;