#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <math.h>
#include <string.h>
int main()
{
    char s[1001] = {0}, s1[1001] = {0},temp;
    long long n = 0,a = 0,nn=0,t = 0,i,lengh = 0;
    scanf("%s",s);//读入8进制字符串
    lengh = strlen(s);
    for (i = 0; i < lengh/2; i++) 
    {
        temp = s[i];
        s[i] = s[lengh - i - 1];
        s[lengh - i - 1] = temp;
    }//倒置8进制字符串
    for (i = 0; i < lengh; i++)
    {
            n += (s[i] - 48) * pow(8, i);
    }//转化成10进制数字
    nn = n;
    i = 0;
    while (nn)
    {
        t = nn % 16;
        if (t >= 10)
            s1[i] = t + 87;
        else
            s1[i] = t + 48;
        nn = nn / 16;
        i++;
    }//10进制转化成16进制储存为字符串（逆序）
    for ( i =0;i<strlen(s1)/2;i++)
    {
        temp = s1[i];
        s1[i] = s1[strlen(s1) - i - 1];
        s1[strlen(s1) - i - 1] = temp;
    }//字符串倒置
    if (n == 0)
        s1[0] = '0';
    printf("%s",s1);//输出结果
    return 0;
}