c             
⌠             
⌡ a           
b             
              
 100          
  ⌠    2      
  ⌡   x       
x = 1         
              
 100          
  ⌠   1       
  ⎮   ─       
  ⌡   2       
x = 1         
              
 100          
  ⌠    2      
  ⎮   x       
  ⎮   ──      
  ⌡    2      
x = 1         
              
      c       
      ⌠       
      ⌡      a
bbbbbbbbbbbb  
              
c             
⌠             
⌡ aaaaaaaaaaaa
b             
              
cccccccccccc  
      ⌠       
      ⌡      a
      b