-tree c-p-c c-tec ccccc ccett cech ceche cecht ceere cepet cerc- cerce cerec cerer ceret cerre certe cette chech cheep cheer cheet chehr chepe chere cherp chert chete cheth chett chher cpctc cphpc crece creep creer crepe crept crete cteep ctree cttee echte ecthr eeeee eepee eetch ehret eperc epher erech erect erept erere erte erter erthe etche etete ether etree etter h-tcp he-he heche hecht hect- hecte heepe heere heete hehte heper hepet hept- herce herpt herre herte herth hetch heter hethe hette hheth hhhhh hrere hrrep hthrt htree httpr p-rep pcept pcert pctct peche peece peere peert peete peeth pepee peppe pept- perce perch perec perer peret perre perte perth petch peter petr- petre pette phccc phecc pheer phere phpht phtpp prcht prece prete ptech pter- ptere ptprc ptpre ptprh ptprr ptprt recce recep recet reche recht recpt rect- recte reece reech reepe reere reerh reeth reher rehet repec repet reppe reprt rere- reree reret retch retee reter rethe rette rhett rhppc tecch teche teech teepe teeth tehee tepee tepet terce teret terre tert- tetch teter tethe tetr- tette thec- thect theer thepe ther- there therp thete theth thre- three threp thret thttp treer treet trepp trept trere trete trett ttttt