hdu2057

#include <stdio.h>
int main(){
    __int64 a,b,t;
    while(~scanf("%I64X%I64X",&a,&b)){

        if(a+b<0) {
            printf("-%I64X\n",-(a+b));
        }else{
            printf("%I64X\n",a+b);
        }
    }
    return 0;
}