d-dot ddddd dholl dhool dhoop dhoot dhupu do-do do-ol dodol dodoo dohol dohop dohul dollo dollu dolph dolpo doodo dooth doout dotoo dotto doull doupt douth duddo dudou dullu duplo hhhhh hhtdd ho-ho ho-oh hoddu hodod hohol hohot hollo holo- holou holul hoold hoopl hopl- hoppo hopto hopup hotol hotot hotto hould hoult houtu httpd hudud hudul huhuh hullo hulot huolu hutto huttu hutup l-pop loddo lohho lollo lolol lolth looph loopt looth loph- lopou lopud lotto lotud louth luddu luhot lulul lupul lutol lutto oddup odolo odoul odudu oh-oh oldto ollup olotu ooooh ooooo oopod oploo oplot opodo opoho oppol opto- optot optto othou otolo ototo otulu oullo outdo outto phlpp phool phot- photo photu phpht phtpp phutu ploop ploot plopp plopu plott ploud plouh plout pluot plupp plut- pluto po-po podo- podol podul pollo pollu polod polop polut poopo popop poppo popup potoo potop potto pottu poulp poult puhtu pull- pullu pulut puppo putt- putto puttu putuo putup t-pop t-top thold tholl thoth thoul thout thttp to-do to-ho tohot toldo tollo toloo tolu- toold toolt tooth toplo topo- topol topot toppo topto topup toto- totoo totop totup touho tould toull ttttt tudou tulou tuotu tupou tutto u-pop udol udoll udult uh-oh uh-uh uhdoh uhhoh uhhuh uloop ultop ululu up-do uphol upolo upolu upput uptop ututo uuuuu