#include <bits/stdc++.h>
#define rep(i,n) for(int i = 0; i < (n); ++i)
#define srep(i,s,t) for (int i = s; i < t; ++i)
#define drep(i,n) for(int i = (n)-1; i >= 0; --i)
using namespace std;
typedef long long int ll;
typedef pair<int,int> P;
#define yn {puts("YES");}else{puts("NO");}
#define MAX_N 200005

int main() {
    int a, b;
    cin >> a >> b;
    if(a == 10)a = 2;
    if(a == -10)a = -2;
    if(b == 10)b = 2;
    if(b == -10)b = -2;
    int ans = a + b;
    if(ans < 0)cout << '-';
    ans = abs(ans);
    if(ans <= 1)cout << ans << endl;
    else if(ans == 2)cout << 10 << endl;
    else if(ans == 3)cout << 11 << endl;
    else cout << 100 << endl;
    return 0;
}