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#include<stdio.h>
#include<string.h>
char s[]= {'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'};
char s1[20],s2[20];
int l1,l2;
int find(char c) {
	int i=0;
	while(s[i]!=c)
		i++;
	return i;
}
int vs() {
	if(l1==l2)
		return strcmp(s1,s2);
	else {
		if(l1>l2)
			return 1;
		else
			return -1;
	}
}
int main() {
//	freopen("input.txt","r",stdin);
//	freopen("output.txt","w",stdout);
	int a[20],b[20],sum[20];
	while(scanf("%s %s",s1,s2)!=EOF) {
		char c1='+',c2='+';
		l1=strlen(s1),l2=strlen(s2);
		if(s1[0]=='+') {
			for(int i=0; i<l1-1; i++) {
				s1[i]=s1[i+1];
			}
			l1--;
		}
		if(s1[0]=='-') {
			c1='-';
			for(int i=0; i<l1-1; i++) {
				s1[i]=s1[i+1];
			}
			l1--;
		}
		if(s2[0]=='+') {
			for(int i=0; i<l2-1; i++) {
				s2[i]=s2[i+1];
			}
			l2--;
		}
		if(s2[0]=='-') {
			c2='-';
			for(int i=0; i<l2-1; i++) {
				s2[i]=s2[i+1];
			}
			l2--;
		}
		int t0=0;
		for(int i=0; i<l1; i++) {
			if(s1[i]=='0')
				t0++;
			else
				break;
		}
		if(t0)
			for(int i=0; i<l1-t0; i++) {
				s1[i]=s1[i+t0];
			}
		l1-=t0;
		t0=0;
		for(int i=0; i<l2; i++) {
			if(s2[i]=='0')
				t0++;
			else
				break;
		}
		if(t0)
			for(int i=0; i<l2-t0; i++) {
				s2[i]=s2[i+t0];
			}
		l2-=t0;
		memset(a,0,sizeof(a));
		memset(b,0,sizeof(b));
		memset(sum,0,sizeof(sum));
		for(int i=0; i<l1; i++)
			a[i]=find(s1[l1-i-1]);
		for(int i=0; i<l2; i++)
			b[i]=find(s2[l2-i-1]);
		if(c1==c2) {
			int lmax;
			if(l1>l2)
				lmax=l1;
			else
				lmax=l2;
			for(int i=0; i<lmax; i++) {
				if(sum[i]+a[i]+b[i]<16)
					sum[i]+=a[i]+b[i];
				else {
					sum[i+1]=1;
					sum[i]+=a[i]+b[i]-16;
				}
			}
			if(sum[lmax]==1)
				lmax++;
			if(lmax==0)
				printf("0\n");
			else {
				if(c1=='-')
					printf("%c",c1);
				bool flag=false;
				for(int i=lmax-1; i>=0; i--) {
					if(s[sum[i]]!='0') {
						printf("%c",s[sum[i]]);
						flag=true;
					} else {
						if(flag)
							printf("%c",s[sum[i]]);
					}
				}
				printf("\n");
			}
		} else {
			int tvs=vs();
			if(tvs==0)
				printf("0\n");
			else {
				int lmax;
				if(tvs>0) {
					if(l1>l2)
						lmax=l1;
					else
						lmax=l2;
					for(int i=0; i<lmax; i++) {
						if(a[i]-b[i]<0) {
							a[i+1]--;
							sum[i]=a[i]+16-b[i];
						} else
							sum[i]=a[i]-b[i];
					}
				} else {
					if(l1>l2)
						lmax=l1;
					else
						lmax=l2;
					for(int i=0; i<lmax; i++) {
						if(b[i]-a[i]<0) {
							b[i+1]--;
							sum[i]=b[i]+16-a[i];
						} else
							sum[i]=b[i]-a[i];
					}
				}
				while(sum[lmax-1]==0&&lmax>0)
					lmax--;
				if(lmax==0)
					printf("0\n");
				else {
					if(tvs>0&&c1=='-')
						printf("%c",c1);
					else if(tvs<0&&c2=='-')
						printf("%c",c2);
					bool flag=false;
					for(int i=lmax-1; i>=0; i--) {
						if(s[sum[i]]!='0') {
							printf("%c",s[sum[i]]);
							flag=true;
						} else {
							if(flag)
								printf("%c",s[sum[i]]);
						}
					}
					printf("\n");
				}
			}
		}
		memset(s1,0,sizeof(s1));
		memset(s2,0,sizeof(s2));
	}
	return 0;
}

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#include<stdio.h>
#include <windows.h>
#include <time.h>
char s[]= {'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'};
int main() {
//freopen("input.txt","r",stdin);
	freopen("input.txt","w",stdout);
	srand((unsigned)time(NULL));
	for(int T=0; T<100000; T++) {
		if(rand()%2)
			if(rand()%2)
				printf("+");
			else
				printf("-");
		int l;
		l=rand()%16+1;
		for(int i=0; i<l; i++)
			printf("%c",s[rand()%16]);
		printf(" ");
		if(rand()%2)
			if(rand()%2)
				printf("+");
			else
				printf("-");
		l=rand()%16+1;
		for(int i=0; i<l; i++)
			printf("%c",s[rand()%16]);
		printf("\n");
	}
	return 0;
}