#include <stdio.h>
#include <math.h>


int main(){

int decimalNumber;
int octalNumber = 0;
int i = 1;

while((scanf("%d", &decimalNumber))!=EOF){
while (decimalNumber != 0){
  octalNumber += (decimalNumber % 8) * i;
  decimalNumber /= 8;
  i *= 10;
}
printf("%d\n", octalNumber);
i = 1;
octalNumber = 0;
}
return 0;
}