a,b = map(int,input().split())

import re
c=re.compile(r'^-?[1-9][0]{2,}$')
if c.findall(str(a)) != [] and c.findall(str(b)) != []:
    print(int(a*b/10))
else:
    if abs(a*b) <=99999999:
        print(a*b)
    else:
        print('E')