#include <bits/stdc++.h>
using namespace std;
#define F first
#define S second
#define R cin>>
#define ln cout<<'\n'
#define ll long long
#define in(a) insert(a)
#define pb(a) push_back(a)
#define pd(a) printf("%.10f\n",a)
#define mem(a) memset(a,0,sizeof(a))
#define all(c) (c).begin(),(c).end()
#define iter(c) __typeof((c).begin())
#define rrep(i,n) for(ll i=(ll)(n)-1;i>=0;i--)
#define REP(i,m,n) for(ll i=(ll)(m);i<(ll)(n);i++)
#define rep(i,n) REP(i,0,n)
#define tr(it,c) for(iter(c) it=(c).begin();it!=(c).end();it++)
ll check(ll n,ll m,ll x,ll y){return x>=0&&x<n&&y>=0&&y<m;}void pr(){ln;}
template<class A,class...B>void pr(const A &a,const B&...b){cout<<a<<(sizeof...(b)?" ":"");pr(b...);}
template<class A>void PR(A a,ll n){rep(i,n)cout<<(i?" ":"")<<a[i];ln;}
const ll MAX=1e9+7,MAXL=1LL<<61,dx[8]={-1,0,1,0,-1,-1,1,1},dy[8]={0,1,0,-1,-1,1,1,-1};
typedef pair<ll,ll> P;

string Z(string s){int i;for(i=0;i<s.size()-1;i++)if(s[i]!='0')break;return s.substr(i);}
string ADD(string s,string t) {
  if(s.size()<t.size())swap(s,t);s='0'+s;
  reverse(all(t));while(s.size()>t.size())t+='0';reverse(all(t));int c=0;
  rrep(i,s.size()) {
    if(c){if(s[i]=='9'){s[i]='0';c=1;}else{s[i]=(char)(s[i]+1);c=0;}}
    int sum=(int)s[i]+(int)t[i]-'0'*2;
    if(sum>=10){s[i]=(char)(sum-10+'0');c=1;}
    else s[i]=(char)(sum+'0');
  }
  return Z(s);
}

void Main() {
  string s,t;
  cin >> s >> t;
  pr(ADD(s,t));
}

int main(){ios::sync_with_stdio(0);cin.tie(0);Main();return 0;}