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#include<stdio.h>
#include<stdlib.h>

int main(void)
{
    int i,m;
    char numbers[100];
    while(scanf("%d%s%d",&i,numbers,&m)!=EOF)
    {
        long n;
        if(m==8)
        {   printf("%o",strtol(numbers,NULL,i));
        }
        else if(m==16)
        {
            printf("%X",n=strtol(numbers,NULL,i));
        }
        printf("\n");
    }
    return 0;
}