import sys
read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines

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

def anzan(A):
    A = abs(A)
    L = len(str(A))
    return L >= 3 and A % (10**(L-1)) == 0

answer = A * B
if anzan(A) and anzan(B):
    answer //= 10
else:
    if not(-99999999 <= answer <= 99999999):
        answer = 'E'

print(answer)