$ python3 3square.py 

 --- Welcome to 3square! --- 

------------------------------
  | |   1. cold cube
  | |   2. felis silvestris
  | |   3. greek h


q123> tacos

Please enter q, 1, 2, or 3...

q123> 4

Please enter q, 1, 2, or 3...

q123> 2
2: tacos
Please enter a 3-letter word...
2: qqq
------------------------------
  | |   1. cold cube
 Q|Q|Q  2. felis silvestris
  | |   3. greek h


q123> 1
1: aaa
------------------------------
 A|A|A  1. cold cube
 Q|Q|Q  2. felis silvestris
  | |   3. greek h


q123> 3
3: Dog
------------------------------
 A|A|A  1. cold cube
 Q|Q|Q  2. felis silvestris
 D|O|G  3. greek h


q123> 3
3: eta
------------------------------
 A|A|A  1. cold cube
 Q|Q|Q  2. felis silvestris
 E|T|A  3. greek h


q123> 2
2: cat
------------------------------
 A|A|A  1. cold cube
 C|A|T  2. felis silvestris
 E|T|A  3. greek h


q123> 1
1: ice  

You solved it!!

------------------------------
 I|C|E  1. cold cube
 C|A|T  2. felis silvestris
 E|T|A  3. greek h