ModAdd

# -*- coding: utf-8 -*-
"""
Created on Sat Sep 22 12:55:27 2018

@author: kiyakf1
"""

from sys import stdin, stdout
from itertools import izip_longest

n1 = raw_input()
n2 = raw_input()

result = []


it = izip_longest(iter(n1[::-1]),iter(n2[::-1]),fillvalue = 0)
    

for i in it:
    tot = int(i[0])+int(i[1])
    result.append(tot if tot<10 else tot-10)
    
    
    res=""
for n in reversed(result):
    res+=str(n)

print res
    

Test 1

Verdict: ACCEPTED

Test 2

Verdict: TIME LIMIT EXCEEDED

Test 3

Verdict: TIME LIMIT EXCEEDED

Test 4

Verdict: TIME LIMIT EXCEEDED

Test 5

Verdict: TIME LIMIT EXCEEDED

Test 6

Verdict: TIME LIMIT EXCEEDED

Test 7

Verdict: TIME LIMIT EXCEEDED

Test 8

Verdict: TIME LIMIT EXCEEDED

Test 9

Verdict: TIME LIMIT EXCEEDED

Test 10

Verdict: ACCEPTED