A,B=map(int,input().split())
ans=A*B
n=len(str(A))-1
m=len(str(B))-1

if A % (10**n) == 0 and B%(10**m) == 0:
    ans/=10
    print(int(ans))
elif -99999999>ans or 99999999<ans:
        print('E')
else:
    print(ans)