import sys
input=lambda: sys.stdin.readline().rstrip()

a,b=map(int,input().split())
n,m=len(str(a))-1,len(str(b))-1
if a<0:
  n-=1
if b<0:
  m-=1
if a==(a//(10**n))*10**n and b==(b//(10**m))*10**m and n>=2 and m>=2:
  print((a//(10**n))*(b//(10**m))*(10**(n+m-1)))
else:
  if a*b<-99999999 or 99999999<a*b:
    print("E")
  else:
    print(a*b)