C++ :

#include<iostream>
#include<string>
#include<algorithm>
#include<cstdio>
#include<cstring>
#include<cmath>
#include<sstream>
#include<vector>
using namespace std;
vector<int>a,b,c;
string A,B;
int prime[30];
int judge(int n)
{
    for(int i=2;i<=sqrt(n);i++)
        if(n%i==0) return 0;
    return 1;
}
void isprime()
{
    int k=1;
    int n=2;
    while(k<=25)
    {
        if(judge(n)) prime[k++]=n;
        n++;
    }
}
void toInt()
{
    int x;
    a.clear();b.clear();
    for(int i=0;i<A.size();i++) if(A[i]==',') A[i]=' ';
    for(int i=0;i<B.size();i++) if(B[i]==',') B[i]=' ';
    istringstream is(A),is1(B);
    while(is>>x) a.push_back(x);
    while(is1>>x) b.push_back(x);
    reverse(a.begin(),a.end());
    reverse(b.begin(),b.end());
}
void add()
{
    c.clear();
    int v=0,w=0,k=1;
    int aLength=a.size(),bLength=b.size();
    for(int i=0;i<((aLength>bLength)?aLength:bLength);i++)
    {
        if(i>=aLength) v=b[i]+w;
        else if(i>=bLength) v=a[i]+w;
        else v=a[i]+b[i]+w;
        c.push_back(v%prime[k]);
        w=v/prime[k++];
    }
    if(w) c.push_back(w);
    reverse(c.begin(),c.end());
    for(int i=0;i<c.size();i++)
    {
        if(i==c.size()-1) cout<<c[i]<<endl;
        else cout<<c[i]<<",";
    }
}
void print()
{
    int i;
    for(i=0;i<a.size()-1;i++) cout<<a[i]<<" ";cout<<a[i]<<endl;
    for(i=0;i<b.size()-1;i++) cout<<b[i]<<" ";cout<<b[i]<<endl;
}
int main()
{
    isprime();
    while(cin>>A>>B && (A!="0" && B!="0"))
    {
        toInt();
        //print();
        add();
    }
    return 0;
}