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

int main(void){
	int i,j;
	char num[128];
	while(scanf("%d %s %d",&i,num,&j)+1){
		if(j==8)
			printf("%o\n",strtol(num,NULL,i));
		if(j==16)
			printf("%X\n",strtol(num,NULL,i));
	}
	return 0;
}