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| Lichen on a tree | 
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| Typing symbols on a keyboard | 
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| Guitar fretboard diagram | 
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| Comfortable cat | 
Exploring the relation between persistence, endurance and success.
|  | 
| Lichen on a tree | 
|  | 
| Typing symbols on a keyboard | 
|  | 
| Guitar fretboard diagram | 
|  | 
| Comfortable cat |