Text this: Enumeration of index 3 and 4 subgroups of hyperbolic triangle symmetry groups

 _    _      ___      _____     _____     ______  
| \  / ||   / _ \\   /  ___||  |  ___||  /_   _// 
|  \/  ||  / //\ \\ | // __    | ||__    `-| |,-  
| .  . || |  ___  ||| \\_\ ||  | ||__      | ||   
|_|\/|_|| |_||  |_|| \____//   |_____||    |_||   
`-`  `-`  `-`   `-`   `---`    `-----`     `-`'