def main():
    A,B =map(int,input().split())
    a,b= str(A),str(B)
    if a[0] =='-':
        a=a[1:]
    if b[0] =='-':
        b=b[1:]
    bl = 1#暗算できるか
    def calc(bl):
        c =A*B
        if bl:
            return int(c/10)
        if abs(c)>99999999:
            return 'E'
        else:
            return c

    if len(a) < 3 or len(b) <3:
        bl=0
    if bl:
        for s in a[1:]:
            if s !='0':
                bl =0
        if bl:
            for s in b[1:]:
                if s!='0':
                    bl=0
    print(calc(bl))
main()