#!/bin/sh

cmpt=1
if read prec ;then
  while read ligne 
  do
    if [ "$prec" != "$ligne" ] ;then
      echo $cmpt " "$prec
      cmpt=1
    else 
      cmpt=`expr $cmpt + 1`
    fi
    prec=$ligne
  done
  echo $cmpt "  " $prec
fi