ModAdd

#CSES ModAdd
#Konstantin Chukharev 22.9.

if __name__ == '__main__':
    s1=input()
    s2=input()
    d=len(s1)-len(s2)
    if d>0:
        print(s1[:d],end='')
        for i in range(0,len(s2)):
            print((int(s1[i+d])+int(s2[i]))%10,end='')
    elif d<0:
        print(s2[:-d],end='')
        for i in range(0,len(s1)):
            print((int(s1[i])+int(s2[i-d]))%10,end='')
    else:
        for i in range(0,len(s1)):
            print((int(s1[i])+int(s2[i]))%10,end='')

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: TIME LIMIT EXCEEDED

Test 4

Verdict: ACCEPTED

Test 5

Verdict: ACCEPTED

Test 6

Verdict: ACCEPTED

Test 7

Verdict: TIME LIMIT EXCEEDED

Test 8

Verdict: TIME LIMIT EXCEEDED

Test 9

Verdict: ACCEPTED

Test 10

Verdict: ACCEPTED