from re import fullmatch

A, B = input().split()

C = int(A) * int(B)
pat = r"-?[1-9]000*"

if fullmatch(pat, A) and fullmatch(pat, B):
    print(C // 10)
elif -99999999 <= C <= 99999999:
    print(C)
else:
    print("E")