How do I edit command pr
tr [:upper:] [:lower:] < "${FILE}" | tr -d [:digit:] | sort | pr -s' ' -t3 | nl
so that the output looks like this:
 1  bcxwhex jbdafn  osnu
 2  bijly   jdofnx  uriqcl
 3  btgr    jz      uztyp
 4  bwifmn  kfaky   wfwdz
 5  bxgvs   kigdo   wgdax
 6  cfukt   lf      wgfil
 7  cgyqlp  lnccknh ypt
 8  eocbm   njevos  zcplnln
 9  hgmbc   ocndbmr znknpo
10  iawmkbh opder   zyezfq
and not like this:
 1  bcxwhex jbdafn osnu
 2  bijly jdofnx uriqcl
 3  btgr jz uztyp
 4  bwifmn kfaky wfwdz
 5  bxgvs kigdo wgdax
 6  cfukt lf wgfil
 7  cgyqlp lnccknh ypt
 8  eocbm njevos zcplnln
 9  hgmbc ocndbmr znknpo
10  iawmkbh opder zyezfq
 
     
    