rudd vldl bull guff fugu furl dull blvd vulg brrr duff bulb burl kuku vulg 
gulf durr frug burr blur rudd grub kudu bubu guru burg kuru burb burd burl 
buff blvd lull drug gull bull ruff drub urdu fufu lulu vugg flub bldg burr 
ruru lurk gulf bulg luff bulk lulu full glug kurd