I am working with `Python 2.7.12`

I have the following list:

```
t = [1,2,3,4,5] 

```

I want to have following output: 

```
1+1, 1+2, 1+3, 1+4, 1+5, 2+2, 2+3, 2+4, 2+5, 3+3, 3+4, 3+5, 4+4, 4+5

```

I tried: 

```
zip(t,t[1:])

```

but the output was: 

```
[(1, 2), (2, 3), (3, 4), (4, 5)]  

```

Then, I also tried: 

```
 zip(t,t)    

```

but the output was: 

```
[(1, 1), (2, 2), (3, 3), (4, 4), (5, 5)] 

```