Contribute correction: Tens and units

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