MOD = 10 ** 9 + 7
INF = 10 ** 10
import sys
sys.setrecursionlimit(100000000)
from math import pi
def main():
    a,b = map(int,input().split())
    a0,b0 = a,b
    cnt_a,cnt_b = 0,0
    while a0%10 == 0:
        a0 //= 10
        cnt_a += 1
    while b0%10 == 0:
        b0 //= 10
        cnt_b += 1

    if cnt_a > 1 and cnt_b > 1 and abs(a0)//10 == 0 and abs(b0)//10 == 0:
        print(a*b//10)
    elif -1e8 < a*b < 1e8:
        print(a*b)
    else:
        print('E')
if __name__ == '__main__':
    main()