A, B = map(int, input().split())

a = str(abs(A))[0]
b = str(abs(B))[0]

la = len(str(abs(A)))
lb = len(str(abs(B)))

if la >= 3 and lb >= 3 and abs(A) == int(a + '0' * (la - 1)) and abs(B) == int(b + '0' * (lb - 1)):
    print(A * B // 10)
elif -99999999 <= A * B <= 99999999:
    print(A * B)
else:
    print('E')