#include <bits/stdc++.h>
using namespace std;
int main() {
int a, b, c;
cin>>a>>b>>c;
if (a%b==0 or a%c==0 or b%a==0 or b%c==0 or c%a==0 or c%b==0)
cout<<"/";
else
cout<<"NOSOL";
return 0;
}
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