barcat -H -w1 input/rounded.txt
999k -  
1.0M +  
1.0M ++ 
1.0M    
1.0M -  
1.1M +  

999μ -  
1.0m +  
1.0m    

9.9k -  
 10k +  
 10k +  
 10k +  
 10k    
 99k -  
100k +  
100k    

999  -  
1.0k +  
1.0k    
1.0k -  
1.1k +  
 10k    

999m -  
999m -  
1.0  +  
1.0     
  1     
1.0