Given a non-empty string, keep removing the first and last characters until you get to one or two characters.

For example, if the string was `abcde`, your program should print:

```
abcde
 bcd
  c

```

However, if it was `abcdef`, it should stop at two characters:

```
abcdef
 bcde
  cd

```

Trailing newlines and trailing spaces at the end of each line are optional. You can have as many as you want or none.

Test cases
----------

```
ABCDEFGHIJKLMNOPQRSTUVWXYZ -> ABCDEFGHIJKLMNOPQRSTUVWXYZ
                               BCDEFGHIJKLMNOPQRSTUVWXY 
                                CDEFGHIJKLMNOPQRSTUVWX  
                                 DEFGHIJKLMNOPQRSTUVW   
                                  EFGHIJKLMNOPQRSTUV    
                                   FGHIJKLMNOPQRSTU     
                                    GHIJKLMNOPQRST      
                                     HIJKLMNOPQRS       
                                      IJKLMNOPQR        
                                       JKLMNOPQ         
                                        KLMNOP          
                                         LMNO           
                                          MN            

ABCDEFGHIJKLMNOPQRSTUVWXYZ! -> ABCDEFGHIJKLMNOPQRSTUVWXYZ!
                                BCDEFGHIJKLMNOPQRSTUVWXYZ 
                                 CDEFGHIJKLMNOPQRSTUVWXY  
                                  DEFGHIJKLMNOPQRSTUVWX   
                                   EFGHIJKLMNOPQRSTUVW    
                                    FGHIJKLMNOPQRSTUV     
                                     GHIJKLMNOPQRSTU      
                                      HIJKLMNOPQRST       
                                       IJKLMNOPQRS        
                                        JKLMNOPQR         
                                         KLMNOPQ          
                                          LMNOP           
                                           MNO            
                                            N             

A -> A

AB -> AB

```

Remember this is [code-golf](/questions/tagged/code-golf "show questions tagged 'code-golf'"), so the code with the smallest number of bytes wins.