#!/bin/sh

for vin in `vins`;
do

  echo "Looking for ${vin}"

  WC=0

  for log in *.txt;
  do
    WC=`grep -i "${vin}" ${log} | wc -l`
    if [ ${WC} -ne 0 ]
    then
      echo "Found in ${log}"
      break
    fi
  done
done