sa, sb=input(), input()
a, b=int(sa[:4], 2)*1000+int(sa[4:8], 2)*100+int(sa[8:12], 2)*10+int(sa[12:16], 2), int(sb[:4], 2)*1000+int(sb[4:8], 2)*100+int(sb[8:12], 2)*10+int(sb[12:16], 2)
sm=a+b
if(sm//10000):
    print("OVERFLOW")
else:
    s=""
    base=1000
    for i in range(4):
        add=format(sm//base%10, 'b')
        add='0'*(4-len(add))+add
        s+=add
        base//=10
    print(s)