I have the following code which removes the "refs/changes/digit" but am not getting the expected output,i have the curent output as shown below,can anyone provide inputs on 
how to fix this?

```
source="refs/changes/44/1025744/3 refs/changes/62/1025962/5 refs/changes/45/913745/2"
output = ' '.join(line.split('/', 3)[-1] for line in source.splitlines())
print output

CURRENT OUTPUT:-

1025744/3 refs/changes/62/1025962/5 refs/changes/45/913745/2

expected output

1025744/3 1025962/5 913745/2

```