var line='' var arr=[] var res={}

while(line=readline()){ arr=line.split(' ') if(arr[1]){

     if(res[arr[0]]!==undefined){
     res[arr[0]]+=parseInt(arr[1])
}

else{ res[arr[0]]=parseInt(arr[1]) }

}

} res for(let key in res){ console.log(key+' '+res[key]) }