<?php
$input = explode(', ', readline());
$towns = [];
for ($i = 0, $j = 1; $i < count($input) - 1; $i += 2,$j += 2){
    $town = $input[$i];
    $income = $input[$j];
    if (array_key_exists($town, $towns)){
        $towns[$town] += $income;
    }else{
        $towns[$town] = $income;
    }
}
foreach ($towns as $key => $value){
    echo "$key => $value".PHP_EOL;
}