a,b = map(int,input().split())
def calc(a,b):
    if abs(a*b) > 99999999:
        return 'E'
    else:
        return a*b
if a==0 or b==0:
    print(0)
elif a-(a//abs(a))*int(str(abs(a))[0])*(10**(len(str(abs(a)))-1)) == 0 and  b-(b//abs(b))*int(str(abs(b))[0])*(10**(len(str(abs(b)))-1)) == 0:
    if abs(a) >= 100 and abs(b) >= 100:
        print(a*b//10)
    else:
        print(calc(a,b))
else:
    print(calc(a,b))