#!/bin/bash

echo -n "Please input end number => "
read num

count=1

while (( $count <= $num ))
do
  if (( $count % 3 == 0 ))
    then
      echo "aho"
    else if  [ "`echo $count | grep 3`" ]
      then
        echo "aho"
      else
        echo $count
    fi
  fi
  (( count+=1 ))
  sleep 1
done

$ ./aho.sh

Please input end number => 15
1
2
aho
4
5
aho
7
8
aho
10
11
aho
aho
14
aho

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