#include <iostream>
#include <string>

using namespace std;
typedef long long ll;
ll solve(ll x){
    string s;
    while(x){
        s.push_back((char)('0' + x%10)); x /= 10;
    }
    ll ret = 0;
    for(int i=0;i<s.size();i++){
        ret *= 10;
        ret += (s[i] - '0');
    }
    return ret;
}

int main(){
    ll i,p,q,x,y;    
    cin >> p >> q >> x >> y;
    ll revn = y;
    while(revn%10==0) revn += q;
    ll n = solve(revn);
    cout << revn << endl;
    cout << n;
    n %= p;
    while(n!=x){
        cout << 0;
        (n *= 10) %= p;
    }
    cout << endl;
}