#include <iostream>
#include <locale.h>

using namespace std;

int main()
{
    setlocale(LC_ALL, "Rus");
    int sum = 0;
    int p = 0;
    int check = 0;
    int x = 0;
    int unknown = 0; //пропущенный символ
    string card;
    getline(cin, card);for(int i = 0; i < card.size(); i++){
        cout<<card[i];
    }
    for(int i = card.size() - 1; i >= 0; i--) {
        char ch = card[i];
        if(ch >= '0' && ch <= '9'){
            p = (i % 2 == 0 ? 2 : 1);
            char s = card[i] - '0';
            sum += (s * p > 9 ? (s * p) - 9 : s * p);
        } else {
            if(ch == 'x')
                check = (i % 2 == 0 ? 2 : 1);
        }
    }
    if(check > 0){
        cout<<"begin"<<endl;
        for(int i = 0; i < 9; i++){
            unknown = (x * check > 9 ? (x * check) - 9 : x * check);
            if((sum + unknown) % 10 == 0){
                cout << "sum = " << sum + unknown << endl << "number = " <<x << endl;
                break;
            } else x++;
        }
    } else cout<<(sum % 10 == 0 ? "It's right." : "It's wrong.");
    return 0;
}