A, B = map(int, input().split())

if A % 100 == 0 and B % 100 == 0 and A % 10 ** (len(str(abs(A))) - 1) == 0 and B % 10 ** (len(str(abs(B))) - 1) == 0:
    
    print(A * B // 10)
    
else:
    A *= B
    if abs(A) < 10 ** 8:
        print(A)
        
    else:
        print('E')