#include <iostream>
#include <cstring>

using namespace std;

const char alphabet[]="0123456789ABCDEFGHIJ";

class numar
{
    public:
    int stock[1000];                        //Sirul de cifre
    int len;                                //lungimea numarului
    numar(int nr[],int lung)   //Constructor
    {
        memset(stock,0,sizeof(stock));
        for(int i=0;i<lung;i++)
            stock[i]=nr[i];
        len=lung;
    }
    friend ostream& operator<< (ostream& o, numar const& nr1);
};
inline ostream& operator<< (ostream& o,numar const& nr1)
{
    //Transforma numarul in string atunci cand se afiseaza
    //65535 e -1
    for(int i=nr1.len-1;i!=-1;i--)
        o<<alphabet[nr1.stock[i]];
    return o;
}

numar add(numar nr1,numar nr2)
{
    //aduna doua numere, ambele in aceasi baza
    int base=10,trans=0,i;
    numar nr3(0,0);
    for(i=0;i<nr1.len||i<nr2.len;i++){
        trans = trans + nr1.stock[i]+nr2.stock[i];
        nr3.stock[i]=trans%base;
        trans/=base;
    }
    if(trans!=0){
        nr3.len=i+1;
        nr3.stock[i]=trans;
    }
    else
        nr3.len=i;
    return nr3;
}
numar convstrtoint(string strcifre){
    //Transforma stringul in clasa numar
    int baza=10,poz;
    numar nr1(0,0);
    for(int i = strcifre.length()-1;i!=-1;i--){
        poz = strchr(alphabet,strcifre[i])-alphabet;
        nr1.stock[nr1.len++]=poz;
    }
    return nr1;
}
int main(){
    string nr;
    cin>>nr;
    numar a=convstrtoint(nr);
    cin>>nr;
    numar b=convstrtoint(nr);
    cout<<add(a,b)<<endl;
    return 0;
}