#一位一位算即可
#先把字符串反转过来,从低位开始算
#计算出结果也翻转一下输出即可
# import sys
while True:
    try:
        a_str = input()[::-1].strip()
        b_str = input()[::-1].strip()
        r_len = max(len(a_str), len(b_str))     
        result = ""
        i = 0
        last_sum = 0
        while i < r_len:
            a = 0
            b = 0
            if i < len(a_str):
                a = int(a_str[i])
            if i < len(b_str):
                b = int(b_str[i])
            c = a + b + last_sum
            if c > 9:
                last_sum = 1
            else: 
                last_sum = 0
            result += str(c % 10)
            i += 1
        if last_sum == 1:
            result += str(last_sum)
        print(result[::-1])
    except:
#         print(sys.exc_info())
        break