#!/bin/bash

awk '{
    if($0~/([0-9]{1,3}.){3}[0-9]{1,3}/){
        split($0,arr,".");
        for(i in arr){
            if(arr[i]>255)
            {
                print "no";
                next;
            }
        }
        print "yes"
    } else {
        print "error"
    }
}'