Write a program that opens the following file (numbers1.txt ) that contains 4 lines of numbers as follows:

```
numbers1.txt
 100   900
-3.2   25.9 
30       11
 ( Empty line)
200    500 

```

The program should read the two numbers in every line and print the maximum using max() function
The program should Print a message when there isn't a number

my code doesn't work??

```
f=open('numbers1.txt','r')
list1=f.readlines()
for i in list1:
    print(max(i))

```