#!/bin/bash

set -e

if [ $# -lt 2 ]; then
    echo "$0 [-y] suffix initcounter"
    exit
fi

suffix=$1
move=no

if [ z"$suffix" = "z-y" ]; then
    shift
    suffix=$1
    move=yes
fi

j=$2

shift 2

for i in $*
do
    new="${j}_${suffix}.avi" 
    echo "$i -> $new"
    if [ $move = yes ]; then
	mv $i $new
    fi
    j=`expr $j + 1`
done