a,b = map(int,input().split())
if a%10 == 0 and b%10 == 0:
    if abs(a) < 100 or abs(b) < 100:
        print(a*b)
    else:
        print(a*b//10)
else:
    ans = a*b
    if abs(ans) > 99999999:
        print('E')
    else:
        print(ans)