#include<bits/stdc++.h>
using namespace std;
int main(){
int n;
while(cin>>n){
string res;
if(n == 0) res = "0";
while(n){
int t = n % 8;
res += '0' + t;
n /= 8;
}
reverse(res.begin(),res.end());
cout<<res<<endl;
}
return 0;
}
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