A, B = [x for x in input()]

def cal(a, b):
    x = int(a) * int(b)
    
    if list(set(a[1:]))[0] == '0' and list(set(b[1:]))[0] == '0':
        print(x // 10)
        
    else:
        if len(str(x)) > 8:
            print('E')
        else:
            print(x)

cal(A, B)