https://www.e-olymp.com/az/problems/1461

/*
    Author: Kanan Asgarli
    https://www.e-olymp.com/az/problems/1461
*/
#include <iostream>
#include <algorithm>
using namespace std;
int f(int n){
    if(n == 0)
        return 1;
    return n%10*f(n/10);
}
int n, m, k, maxi = 1000000000, ans;
int main()
{

    cin>>n>>k;
    for(int i = 0; i < n; i++){
        cin>>m;
        if(maxi > abs(f(m)-k)){
            maxi = abs(f(m)-k);
            ans = m;
        }
    }
    cout<<ans<<endl;
    return 0;
}