Can't figure this one out

[Stefython]

Thanks everybody!
Your answers helped allot.

I'm just still a bit confused. In earlier lines of code I used the same type of code as described above and it would execute without any error:

message = "\nMy favorite machine is the "

print(message + farm_equipment[0].upper())

The result:

Output:
My favorite machine is the JD R4038

Is this because I'm specifying an element from the list, which is a string and is thus allowed?