#include <bits/stdc++.h>
using namespace std;
inline void fastInput(long long int &n){
char ch;
long long int sign = 1;
while(ch = getchar_unlocked(), isspace(ch)) {
};
n = 0;
if(ch == '-')
sign = -1;
else n = ch - '0';
while(ch = getchar_unlocked(), isdigit(ch))
n = (n << 3) + (n << 1) + ch - '0';
n *= sign;
}
long long int trailingZeroes(long long int n){
long long int cnt = 0;
while (n > 0) {
n /= 5;
cnt += n;
}
return cnt;
}
void binarySearch(long long int n, long long int d){
long long int low = 1;
long long int high = 1e14+1;
while (low < high) {
long long int mid = (low + high) / 2;
long long int count = trailingZeroes(mid);
if (count < n)
low = mid + 1;
else
high = mid;
}
vector<long long int> result;
while (trailingZeroes(low) == n) {
result.push_back(low);
low++;
}
bool flag = true;
for (long long int i = 0; i < result.size() && flag; i++) {
if(result[i]%d==0){
printf("%lld\n",result[i]);
flag = false;
}
}
if(flag) printf("NINGUNO\n");
}
int main() {
long long int d, n;
fastInput(d);
fastInput(n);
while ((n!=0 || d!=0)) {
binarySearch(n,d);
fastInput(d);
fastInput(n);
}
return 0;
}